72 results on '"Barrett, Nick"'
Search Results
2. Evidence of Ba-rich surface segregation in Ba1-xSrxTiO3 and Ba-rich surfactant in SrTiO3/ Ba1-xSrxTiO3 stacks grown by combinatorial pulsed laser deposition
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Agudelo-Estrada Santiago, Barrett Nick, Lubin Christophe, Wolfman Jérôme, Negulescu Beatrice, Andreazza Pascal, and Ruyter Antoine
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Physics ,QC1-999 - Abstract
The interface of a La0.7Sr0.3MnO3/SrTiO3 bilayer was modulated by introducing 3 unit cells of Ba1-xSrxTiO3 using Combinatorial Pulsed Laser Deposition. A wide range of chemical compositions was studied within the same sample, with BSTx stoichiometry variable from 0.5 to 1 along Y-axis, while the SrTiO3 overlayer thickness was modified along the X direction [Fig. 1(a)]. We performed high-resolution, laboratory-based angle-resolved XPS studies of the BSTx film surface providing information on the thickness and composition of the surface and sub-surface layers. Based on the attenuation of the La 3d corelevel photoemission signal from the La0.7Sr0.3MnO3 bottom layer, the BST layer is 1.2 nm thick. XPS Ba 3d5/2 core-level spectra were acquired at positions corresponding to different nominal Ba/Sr stoichiometry. In all measurements, the Ba 3d5/2 core-level spectra can be represented by two main components, i.e. one component at higher binding energy (BE = 780.54 eV) corresponding to surface contribution and the other one at lower binding energy (BE = 778.92 eV) corresponding to sub-surface contribution (Figs. 2 and 3). Going from normal to 60° emission angle and using a 3-unit cell thick film model, the surface to sub-surface intensity ratio clearly evolves providing evidence of a Ba-rich surfactant. The surfactant effect is more significant for lower nominal Ba stoichiometry.
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- 2022
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- View/download PDF
3. Feeding, survival, and reproduction of two populations of Eurytemora (Copepoda) exposed to local toxic cyanobacteria
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Engström-Öst, Jonna, Barrett, Nick, Brutemark, Andreas, Vehmaa, Anu, Dwyer, Amanda, Almén, Anna-Karin, and De Stasio, Bart T.
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- 2017
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4. Roadmap on ferroelectric hafnia- and zirconia-based materials and devices.
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Silva, José P. B., Alcala, Ruben, Avci, Uygar E., Barrett, Nick, Bégon-Lours, Laura, Borg, Mattias, Byun, Seungyong, Chang, Sou-Chi, Cheong, Sang-Wook, Choe, Duk-Hyun, Coignus, Jean, Deshpande, Veeresh, Dimoulas, Athanasios, Dubourdieu, Catherine, Fina, Ignasi, Funakubo, Hiroshi, Grenouillet, Laurent, Gruverman, Alexei, Heo, Jinseong, and Hoffmann, Michael
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ZIRCONIUM oxide ,HAFNIUM oxide ,ELECTRONIC systems ,HIGH voltages ,FERROELECTRIC polymers ,SCIENTIFIC community - Abstract
Ferroelectric hafnium and zirconium oxides have undergone rapid scientific development over the last decade, pushing them to the forefront of ultralow-power electronic systems. Maximizing the potential application in memory devices or supercapacitors of these materials requires a combined effort by the scientific community to address technical limitations, which still hinder their application. Besides their favorable intrinsic material properties, HfO
2 –ZrO2 materials face challenges regarding their endurance, retention, wake-up effect, and high switching voltages. In this Roadmap, we intend to combine the expertise of chemistry, physics, material, and device engineers from leading experts in the ferroelectrics research community to set the direction of travel for these binary ferroelectric oxides. Here, we present a comprehensive overview of the current state of the art and offer readers an informed perspective of where this field is heading, what challenges need to be addressed, and possible applications and prospects for further development. [ABSTRACT FROM AUTHOR]- Published
- 2023
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- View/download PDF
5. Evidence of Ba-rich surface segregation in Ba1-xSrxTiO3 and Ba-rich surfactant in SrTiO3/ Ba1-xSrxTiO3 stacks grown by combinatorial pulsed laser deposition.
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Agudelo-Estrada, Santiago, Barrett, Nick, Lubin, Christophe, Wolfman, Jérôme, Negulescu, Beatrice, Andreazza, Pascal, and Ruyter, Antoine
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TITANIUM oxides , *PULSED power systems , *PHOTOEMISSION , *ATTENUATION (Physics) , *STOICHIOMETRY - Abstract
The interface of a La0.7Sr0.3MnO3/SrTiO3 bilayer was modulated by introducing 3 unit cells of Ba1-xSrxTiO3 using Combinatorial Pulsed Laser Deposition. A wide range of chemical compositions was studied within the same sample, with BSTx stoichiometry variable from 0.5 to 1 along Y-axis, while the SrTiO3 overlayer thickness was modified along the X direction [Fig. 1(a)]. We performed high-resolution, laboratory-based angle-resolved XPS studies of the BSTx film surface providing information on the thickness and composition of the surface and sub-surface layers. Based on the attenuation of the La 3d corelevel photoemission signal from the La0.7Sr0.3MnO3 bottom layer, the BST layer is 1.2 nm thick. XPS Ba 3d5/2 core-level spectra were acquired at positions corresponding to different nominal Ba/Sr stoichiometry. In all measurements, the Ba 3d5/2 core-level spectra can be represented by two main components, i.e. one component at higher binding energy (BE = 780.54 eV) corresponding to surface contribution and the other one at lower binding energy (BE = 778.92 eV) corresponding to sub-surface contribution (Figs. 2 and 3). Going from normal to 60° emission angle and using a 3-unit cell thick film model, the surface to sub-surface intensity ratio clearly evolves providing evidence of a Ba-rich surfactant. The surfactant effect is more significant for lower nominal Ba stoichiometry. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
6. Investigating Children's Ability to Reflect on Stored Phonological Representations: The Silent Deletion of Phonemes Task
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Claessen, Mary, Leitao, Suze, and Barrett, Nick
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Background: The development of children's speech, language, and literacy skills is considered to build on a robust and intact speech-processing system, with normally functioning skills at all levels of input and output processing, as well as storage. There are a range of tasks available that assess input and output processing skills, however there are few tasks described in the literature that require a child to reflect on and analyse the internal structure of their own phonological representations. Aims: This paper will describe the development of the Silent Deletion of Phonemes (SDOP) task. This task is designed to assess a child's ability to delete and manipulate sounds silently within their own stored representations while minimizing the impact of any output difficulties. Methods & Procedures: The SDOP task was presented to 69 typically developing mainstream Year 2 children (aged 7;2-8;1 years) as part of a battery of phonological processing skills and literacy measures. Outcomes & Results: Scores for the population of typically developing Year 2 children were normally distributed and above a basal level but not approaching ceiling. Performance on the SDOP was significantly correlated with other measures of phonological processing but not a measure of non-verbal ability. It was most highly correlated with the measure of phonological awareness as expected, as both tasks measure awareness of the internal structure of words. However, the SDOP provided more information about the accuracy and specificity of a child's underlying phonological representations. The SDOP explained a significant amount of concurrent variance in both reading and spelling performance beyond the variance accounted for by the predictors that have been used by researchers to date. In combination, the SDOP and rapid-naming measure accounted for 58.8% of variance in performance on the reading measure and 54.4% of variance in spelling performance. Conclusions & Implications: The SDOP task appears to be a valid and reliable tool to assess the internal structure of a child's stored phonological representations. Profiling phonological representations allows clinicians to explore children's speech-processing skills which may be particularly useful with children with complex literacy difficulties. (Contains 3 figures and 6 tables.)
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- 2010
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7. Severe respiratory failure
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Williams, Rupert, Salt, Gavin, Jackson, Tom, Mazur, Leianora, Briceno, Natalia, Clapp, Brian, Redwood, Simon, Barrett, Nick, Rajani, Ronak, and Chiribiri, Amedeo
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- 2016
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8. Cavia: Violet
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Barrett, Nick
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- 1999
9. Oxygen vacancy concentration as a function of cycling and polarization state in TiN/Hf0.5Zr0.5O2/TiN ferroelectric capacitors studied by x-ray photoemission electron microscopy.
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Hamouda, Wassim, Mehmood, Furqan, Mikolajick, Thomas, Schroeder, Uwe, Mentes, Tevfik Onur, Locatelli, Andrea, and Barrett, Nick
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FERROELECTRIC capacitors ,CONCENTRATION functions ,ELECTRON microscopy ,PHOTOEMISSION ,SCHOTTKY barrier ,RADARSAT satellites ,SYNCHROTRONS - Abstract
We have studied the field cycling behavior of microscopic TiN/Hf
0.5 Zr0.5 O2 /TiN ferroelectric capacitors using synchrotron-based soft x-ray photoemission electron microscopy. The oxygen vacancy ( V O ) concentration near the top TiN/Hf0.5 Zr0.5 O2 interface is estimated from the reduction of Hf4+ to Hf3+ as measured in the Hf 4f core level spectra. The V O concentration increases with field cycling and redistributes under the effect of the internal field due to the polarization. Upward pointing polarization slightly depletes the concentration near the top interface, whereas downward polarization causes V O drift toward the top interface. The V O redistribution after wake-up is consistent with shifts in the I–V switching peak. The Schottky barrier height for electrons decreases systematically with cycling in polarization states, reflecting the overall increase in V O . [ABSTRACT FROM AUTHOR]- Published
- 2022
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10. IRCAM/Radio-France Cassettes
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Barrett, Nick
- Abstract
Contact: A Journal for Contemporary Music (1971-1988), No 25 (1982): Contact: A Journal for Contemporary Music
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- 2019
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11. Interface-mediated ferroelectric patterning and Mn valency in nano-structured PbTiO3/La0.7Sr0.3MnO3.
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Krug, Ingo P., Doganay, Hatice, Nickel, Florian, Gottlob, Daniel M., Schneider, Claus M., Morelli, Alessio, Preziosi, Daniele, Lindfors-Vrejoiu, Ionela, Laskowski, Robert, and Barrett, Nick
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NANOSTRUCTURES ,INTERFACIAL roughness ,ELECTRONIC structure ,FERROELECTRIC crystals ,ELECTRONICS - Abstract
We employed a multitechnique approach using piezo-force response microscopy and photoemission microscopy to investigate a self-organizing polarization domain pattern in PbTiO
3 /La0.7 Sr0.3 MnO3 (PTO/LSMO) nanostructures. The polarization is correlated with the nanostructure morphology as well as with the thickness and Mn valence of the LSMO template layer. On the LSMO dots, the PTO is upwards polarized, whereas outside the nanodots, the polarization appears both strain and interface roughness dependent. The results suggest that the electronic structure and strain of the PTO/LSMO interface contribute to determining the internal bias of the ferroelectric layer. [ABSTRACT FROM AUTHOR]- Published
- 2016
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12. A fully oxidized V2O5/TiO2(0 0 1)-anatase system studied with in situ synchrotron photoelectron spectroscopy
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Silversmit, Geert, Poelman, Hilde, Depla, Diederik, Barrett, Nick, Marin, Guy B., and De Gryse, Roger
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- 2005
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13. UPS study of the thermal reduction of fully oxidized V 2O 5/TiO 2(0 0 1)-anatase model catalysts
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Silversmit, Geert, Poelman, Hilde, Depla, Diederik, Poelman, Dirk, Barrett, Nick, Marin, Guy B., and Gryse, Roger De
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- 2005
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14. Improving lake mixing process simulations in the Community Land Model by using K profile parameterization
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Zhang, Qunhui, Jin, Jiming, Wang, Xiaochun, Budy, Phaedra E., Barrett, Nick, Null, Sarah E., and Copernicus GmbH
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Mixing Scheme ,Profile Parameterization ,Other Life Sciences ,Vertical ,Lake - Abstract
We improved lake mixing process simulations by applying a vertical mixing scheme, K profile parameterization (KPP), in the Community Land Model (CLM) version 4.5, developed by the National Center for Atmospheric Research. Vertical mixing of the lake water column can significantly affect heat transfer and vertical temperature profiles. However, the current vertical mixing scheme in CLM assumes that mixing is driven primarily by wind, and it produces large biases in thermal process simulations. We improved the CLM lake model by using KPP, where vertical mixing was driven by winds and surface thermal forcing, the latter representing the net heat flux in the lake boundary layer. We chose an Arctic Alaskan lake to evaluate this improved lake model. Results demonstrated that KPP could reproduce the observed lake mixing and significantly improved lake temperature simulations when compared to the original mixing scheme in CLM. Our newly improved model better represents the transition between stratification and turnover due to surface thermal forcing combined with high winds. This improved lake model has great potential for reliable physical lake process predictions and better ecosystem services.
- Published
- 2019
15. FINDING SOLUTIONS: Property and environmental constraints posed design and construction challenges for the latest upgrade on the Heads of the Valleys road in south Wales.
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Barrett, Nick
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ROADS ,DESIGN - Published
- 2023
16. Effects of increased temperature on arctic slimy sculpin Cottus cognatus is mediated by food availability: Implications for climate change.
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Pennock, Casey A., Budy, Phaedra, Atkinson, Carla L., and Barrett, Nick
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TEMPERATURE effect ,CLIMATE change ,LOW temperatures ,NITROGEN excretion ,FACTORIAL experiment designs ,RESPIRATION in plants ,FOOD consumption - Abstract
Lakes are vulnerable to climate change, and warming rates in the Arctic are faster than anywhere on Earth. Fishes are sensitive to changing temperatures, which directly control physiological processes. Food availability should partly dictate responses to climate change because energetic demands change with temperature, but few studies have simultaneously examined temperature and food availability.We used a fully factorial experiment to test effects of food availability and temperature (7.6, 12.7, and 17.4°C; 50 days) on growth, consumption, respiration, and excretion, and effects of temperature (12 and 19.3°C; 27 days) on habitat use and growth of a common, but understudied, mid‐level consumer, slimy sculpin Cottus cognatus, in arctic lakes. We also used bioenergetics modelling to predict consumptive demand under future warming scenarios.Growth rates were 3.4× higher at 12.7°C in high food compared to low food treatments, but the magnitude of differences depended on temperature. Within low food treatments, there was no statistical difference in growth rates among temperatures, suggesting food limitation. Consumption, respiration, and nitrogen excretion increased with temperature independent of food availability. Lower growth rates coincided with lower phosphorus excretion at the highest temperature, suggesting that fish selectively retained phosphorus at high temperatures and low food. In habitat choice experiments, fish were more likely to use the 12°C side of the tank, closely matching their optimal temperature. We predicted a 9% increase in consumption is required to maintain observed growth under a 4°C warming scenario.These results highlight considering changes in food resources and other associated indirect effects (e.g. excretion) that accompany changing temperatures with climate change. Depending on how food webs respond to warming, fish may cope with predicted warming if density‐dependent feedback maintains population sizes. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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17. Leave of absence granted for nurses
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Barrett, Nick
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- 1996
18. Sedation with alfentanil versus fentanyl in patients receiving extracorporeal membrane oxygenation: outcomes from a single-centre retrospective study.
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Barker, Mike, Dixon, Alison A, Camporota, Luigi, Barrett, Nick A, and Wan, Ruth Y Y
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ALFENTANIL ,ANALGESICS ,ANESTHESIA ,APACHE (Disease classification system) ,CHI-squared test ,COMPARATIVE studies ,CRITICAL care medicine ,DRUG prescribing ,EXTRACORPOREAL membrane oxygenation ,FENTANYL ,FISHER exact test ,LENGTH of stay in hospitals ,INTENSIVE care units ,NARCOTICS ,NONPARAMETRIC statistics ,SCIENTIFIC observation ,HEALTH outcome assessment ,PATIENTS ,STATISTICAL hypothesis testing ,SURGERY ,T-test (Statistics) ,PHYSICIAN practice patterns ,PROFESSIONAL practice ,PRE-tests & post-tests ,RETROSPECTIVE studies ,DATA analysis software ,DESCRIPTIVE statistics ,MANN Whitney U Test - Abstract
Introduction: In November 2016, our institution switched from alfentanil to fentanyl for analgesia and sedation in adult patients receiving extracorporeal membrane oxygenation. There is no published evidence comparing the use of alfentanil with fentanyl for sedation in extracorporeal membrane oxygenation patients. We conducted a retrospective observational study to explore any significant differences in patient outcomes or in the prescribing of adjunct sedatives before and after the switch. Methods: Patients were retrospectively identified from a prospectively recorded database of all patients who received extracorporeal membrane oxygenation at our institution between January 2016 and October 2017. Patients included those sedated with alfentanil or fentanyl. The total daily doses of intravenous opioids (alfentanil or fentanyl) were calculated for each patient, and the prescribing of adjunctive sedative or analgesic agents was recorded. Patient demographics, extracorporeal membrane oxygenation modality, clinical outcomes including mortality and length of intensive care and hospital stay were recorded. Results: A total of 174 patients were identified, 69 on alfentanil and 95 on fentanyl. There was no difference found between groups for mode of extracorporeal membrane oxygenation, age, Acute Physiology and Chronic Health Evaluation 2 score (APACHE II) and Charlson score, except for body mass index (p = 0.002). No differences in patient outcomes was observed between groups, although patients in the alfentanil group received a significantly higher median total daily dose of adjuvant sedatives (quetiapine (p = 0.016) and midazolam (p = 0.009)). Conclusions: No differences in patient outcomes were found between extracorporeal membrane oxygenation patients sedated with alfentanil compared with fentanyl. There was a statistically significant reduction in some adjunctive sedatives in patients managed with a fentanyl-based regimen. Prospective studies are required to confirm these results. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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19. Misty Transcendence and the Irony of (Dis)belief.
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Barrett, Nick
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REFORMED Church doctrines , *AESTHETICS , *NARCISSISM - Abstract
In the late 1970s and '80s, a new generation of Chinese poets emerged with a powerful critique of the state's aggressive political reforms. After the 1976 Tiananmen Square incident, the Bejing poet Zaho Zhenkai (known as Bei Dao) wrote a startling poem titled "The Answer" about his refusal to believe in the unquestioned ultimacy of China's worldview. Bei Dao's unique style of poetry helped readers make new associations that were otherwise inaccessible to them. This article examines Bei Dao's use of metaphor in "The Answer" through the lens of the aesthetic philosopher Lambert Zuidervaart and suggests that the poet's use of self-controverting metaphors makes an absent reality graspable and present. The article then considers the role of public theology as it listens to the witness of the poet's bewildering evocation of accessing "the real" through disbelief. In consideration of Herman Bavinck's essay On Contemporary Ethics , this article suggests that theologians (and religious practitioners) should resist the temptation to control the artist's expression even when it limps with narcissism and moral deficiency. Instead, the theologian (and the church) should fight alongside the artist in helping them to share their staggering vision or, in Bei Dao's case, the transcendent power of resiliency sustained by the shadows of the dead. This article aims to generate a fruitful dialogue between Bei Dao and the Reformed theological tradition that underscores the uncanny importance of disbelief as an alternative strategy for cultural transformation and faithful proclamation. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
20. Improving lake mixing process simulations in the Community Land Model by using K profile parameterization.
- Author
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Qunhui Zhang, Jiming Jin, Xiaochun Wang, Budy, Phaedra, Barrett, Nick, and Null, Sarah E.
- Abstract
We improved lake mixing process simulations by applying a vertical mixing scheme, K profile parameterization (KPP), in the Community Land Model (CLM) version 4.5, developed by the National Center for Atmospheric Research. Vertical mixing of the lake water column can significantly affect heat transfer and vertical temperature profiles. However, the current vertical mixing scheme in CLM assumes that mixing is driven primarily by wind, and it produces large biases in thermal process simulations. We improved the CLM lake model by using KPP, where vertical mixing was driven by winds and surface thermal forcing, the latter representing the net heat flux in the lake boundary layer. We chose an Arctic Alaskan lake to evaluate this improved lake model. Results demonstrated that KPP could reproduce the observed lake mixing and significantly improved lake temperature simulations when compared to the original mixing scheme in CLM. Our newly improved model better represents the transition between stratification and turnover due to surface thermal forcing combined with high winds. This improved lake model has great potential for reliable physical lake process predictions and better ecosystem services. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
21. High‐temperature 2D Fermi surface of SrTiO3 studied by energy‐filtered PEEM.
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Watts, John, Mathieu, Claire, Gonzalez, Sara, Lubin, Christophe, Copie, Olivier, Feyer, Vitaliy, Schneider, Claus M., and Barrett, Nick
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TITANIUM dioxide ,ELECTRON gas ,INTERFACES (Physical sciences) ,FERMI surfaces ,METALLIC surfaces ,COMPLEMENTARY metal oxide semiconductors - Abstract
Functional oxides displaying phenomena such as 2D electron gas (2DEG) at oxide interfaces represent potential technological breakthroughs for post‐CMOS (Complementary Metal Oxide Semiconductor) electronics. Noninvasive techniques are required to study the surface chemistry and electronic structure underlying their often unique electrical properties. The sensitivity of photoemission electron microscopy (PEEM) to local potential, chemistry, and electronic structure makes it an invaluable tool for probing the near surface region of microscopic regions and domains of functional materials. In particular, PEEM allows single shot acquisition of the 2D Fermi surface and full angular probing of the symmetry‐induced intensity modulations. We present results demonstrating a 2DEG at the surface of SrTiO3(001) at 140 K. The 2DEG is created by soft X‐ray irradiation and can be reversibly controlled by a combination of soft X‐rays and oxygen partial pressure. [ABSTRACT FROM AUTHOR]
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- 2019
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22. Proficiency-based progression training: an 'end to end' model for decreasing error applied to achievement of effective epidural analgesia during labour: a randomised control study.
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Srinivasan, Karthikeyan Kallidaikurichi, Gallagher, Anthony, O'Brien, Niall, Sudir, Vinod, Barrett, Nick, O'Connor, Raymund, Holt, Francesca, Lee, Peter, O'Donnell, Brian, and Shorten, George
- Abstract
Background Training procedural skills using proficiencybased progression (PBP) methodology has consistently resulted in error reduction. We hypothesised that implementation of metric-based PBP training and a valid assessment tool would decrease the failure rate of epidural analgesia during labour when compared to standard simulation-based training. Methods Detailed, procedure-specific metrics for labour epidural catheter placement were developed based on carefully elicited expert input. Proficiency was defined using criteria derived from clinical performance of experienced practitioners. A PBP curriculum was developed to train medical personnel on these specific metrics and to eliminate errors in a simulation environment. Seventeen novice anaesthetic trainees were randomly allocated to undergo PBP training (Group P) or simulation only training (Group S). Following training, data from the first 10 labour epidurals performed by each participant were recorded. The primary outcome measure was epidural failure rate. Results A total of 74 metrics were developed and validated. The inter-rater reliability (IRR) of the derived assessment tool was 0.88. Of 17 trainees recruited, eight were randomly allocated to group S and six to group P (three trainees did not complete the study). Data from 140 clinical procedures were collected. The incidence of epidural failure was reduced by 54% with PBP training (28.7% in Group S vs 13.3% in Group P, absolute risk reduction 15.4% with 95% CI 2% to 28.8%, p=0.04). Conclusion Procedure-specific metrics developed for labour epidural catheter placement discriminated the performance of experts and novices with an IRR of 0.88. Proficiency-based progression training resulted in a lower incidence of epidural failure compared to simulation only training. Trial registration number NCT02179879. NCT02185079; Post-results. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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- View/download PDF
23. Exploring interlayer Dirac cone coupling in commensurately rotated few-layer graphene on SiC(000-1)
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Mathieu, Claire, Conrad, Edward H., Wang, Feng, Rault, Julien E., Feyer, Vitaliy, Schneider, Claus M., Renault, Olivier, Barrett, Nick, Institut de Droit Européen des Droits de l'Homme - EA 3976 (IDEDH), Université de Montpellier (UM), Georgia Institute of Technology [Atlanta], Géophysique expérimentale (IPGS) (IPGS-GE), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Peter Grünberg Institut, Centre de Linguistique Inter-langues, de Lexicologie, de Linguistique Anglaise et de Corpus (CLILLAC-ARP (EA_3967)), Université Paris Diderot - Paris 7 (UPD7), Laboratoire d'Electronique et des Technologies de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Laboratoire d'Etude des NanoStructures et Imagerie de Surface (LENSIS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Peter Grünberg Institut (PGI), and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)
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[PHYS]Physics [physics] ,Condensed Matter - Materials Science ,Condensed Matter::Materials Science ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences - Abstract
We investigate electronic band-structure images in reciprocal space of few layer graphene epitaxially grown on SiC(000-1). In addition to the observation of commensurate rotation angles of the graphene layers, the k-space images recorded near the Fermi edge highlight structures originating from diffraction of the Dirac cones due to the relative rotation of adjacent layers. The 21.9{\deg} and 27{\deg} rotation angles between two sheets of graphene are responsible for a periodic pattern that can be described with a superlattice unit cells. The superlattice generates replicas of Dirac cones with smaller wave vectors, due to a Brillouin zone folding., Comment: 11 pages, 4 figures
- Published
- 2014
24. Surface polarization, rumpling, and domain ordering of strained ultrathin BaTiO 3 (001) films with in-plane and out-of-plane polarization
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Dionot, Jelle, Geneste, Grégory, Mathieu, Claire, Barrett, Nick, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), This work was performed using the HPC resources from GENCI-CCRT/CINES (Grant No. 2013-097037), and ANR-12-IS04-0001,CHEM-SWITCH,Basculement chimique de la topologie d'ordre ferroélectrique(2012)
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[PHYS]Physics [physics] ,Condensed Matter::Materials Science ,PACS number(s): 77.80.Dj, 77.80.bn, 77.55.fe - Abstract
International audience; BaTiO 3 ultrathin films (thickness ≈ 1.6 nm) with in-and out-of-plane polarization are studied by first-principles calculations. Out-of-plane polarization is simulated using the method proposed by Shimada et al. [Phys. Rev. B 81, 144116 (2010)], which consists in building a supercell containing small domains with alternating up and down polarization. This allows one to investigate the properties of defect free BaTiO 3 ultrathin films with polarization perpendicular to the surface, as a function of in-plane lattice constant, i.e., epitaxial strain. The configurations with polarization perpendicular to the surface (c phase) are found stable under compressive strain, while under tensile strain, the polarization tends to lie in-plane (aa phase), along [110]. In the c phase, the most stable domain width is predicted to be 1 to 2 lattice constants, and the magnitude of the surface rumpling varies according to the direction of the polarization (upwards versus downwards), though its sign is unchanged, the oxygen anions pointing in all cases outwards. Finally, all the surfaces studied are found to be insulating. Analysis of the atom-projected electronic density of states gives insight into the surface contributions to the electronic structure. An important reduction of the Kohn-Sham band gap is predicted at TiO 2 terminations in the c phase (≈ 1 eV with respect to the aa phase). The Madelung potential at the surface plays the dominant role in modifications of the surface electronic structure.
- Published
- 2014
25. Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3.
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Nataf, Guillaume F., GuENnou, Mael, Haußmann, Alexander, Barrett, Nick, and Kreisel, JENs
- Subjects
FERROELECTRIC materials ,MAGNESIUM ,CRYSTAL defects ,LITHIUM niobate ,DOPED semiconductors ,RAMAN spectroscopy ,DOMAIN walls (Ferromagnetism) - Abstract
The domain structure of uniaxial ferroelectric lithium niobate single crystals is investigated using Raman spectroscopy mapping. The influence of doping with magnesium and poling at room temperature is studied by analysing frequency shifts at domain walls and their variations with dopant concentration and annealing conditions. It is shown that defects are stabilized at domain walls and that changes in the defect structures with Mg concentration can be probed by the shift of Raman modes. We show that the signatures of polar defects in the bulk and at the domain walls differ. (© 2016 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim) [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
26. LETTERBOX.
- Author
-
Middlebrooks, Dennis, Russell, Robert, Goodman, Marcia, Brooks, Richard, Zinn, Arlen, Phalen, Shannon, Gerstl, Ronald, Dorgan, John, Van Der Hoop, Roland Gerritsen, Barrett, Nick, Jamison, Lynn, Twaronite, Gene, McMillan, Saundra, Koch, Wendy, Marshall, Douglas, and Taylor, Steve
- Published
- 2022
27. Investigating children's ability to reflect on stored phonological representations: the Silent Deletion of Phonemes Task.
- Author
-
Claessen, Mary, Leitão, Suze, and Barrett, Nick
- Subjects
PHONEMICS ,PHONOLOGY ,PHONOLOGICAL awareness ,PHONOLOGICAL encoding ,COMPREHENSIVE instruction (Reading) ,LANGUAGE acquisition ,COMMUNICATIVE competence in children - Abstract
Background: The development of children's speech, language, and literacy skills is considered to build on a robust and intact speech-processing system, with normally functioning skills at all levels of input and output processing, as well as storage. There are a range of tasks available that assess input and output processing skills, however there are few tasks described in the literature that require a child to reflect on and analyse the internal structure of their own phonological representations. Aims: This paper will describe the development of the Silent Deletion of Phonemes (SDOP) task. This task is designed to assess a child's ability to delete and manipulate sounds silently within their own stored representations while minimizing the impact of any output difficulties. Methods & Procedures: The SDOP task was presented to 69 typically developing mainstream Year 2 children (aged 7;2–8;1 years) as part of a battery of phonological processing skills and literacy measures. Outcomes & Results: Scores for the population of typically developing Year 2 children were normally distributed and above a basal level but not approaching ceiling. Performance on the SDOP was significantly correlated with other measures of phonological processing but not a measure of non-verbal ability. It was most highly correlated with the measure of phonological awareness as expected, as both tasks measure awareness of the internal structure of words. However, the SDOP provided more information about the accuracy and specificity of a child's underlying phonological representations. The SDOP explained a significant amount of concurrent variance in both reading and spelling performance beyond the variance accounted for by the predictors that have been used by researchers to date. In combination, the SDOP and rapid-naming measure accounted for 58.8% of variance in performance on the reading measure and 54.4% of variance in spelling performance. Conclusions & Implications: The SDOP task appears to be a valid and reliable tool to assess the internal structure of a child's stored phonological representations. Profiling phonological representations allows clinicians to explore children's speech-processing skills which may be particularly useful with children with complex literacy difficulties. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
28. Engineers make a journey to the future: THE PACE OF CHANGE IN TRANSPORT THINKING AND TECHNOLOGY SEEMS FASTER THAN AT ANY TIME IN HISTORY, AND THE SHAPE OF THINGS TO COME IN THE NEXT 50 YEARS IS UNCERTAIN.
- Author
-
BARRETT, NICK
- Subjects
ENGINEERS ,TIME ,TIME perception - Published
- 2022
29. Foundations for growth: CONCEPT ENGINEERING CONSULTANTS HAS GAINED A FIRM FOOTHOLD IN THE GROUND INVESTIGATION MARKET BY TAKING ON CHALLENGING WORK. TWENTY FIVE YEARS ON, THE BUSINESS IS PURSUING "PURPOSEFUL GROWTH".
- Author
-
BARRETT, NICK
- Subjects
CONSULTING engineers ,BUSINESS enterprises - Published
- 2022
30. Steel buoyant despite price rises and shortages.
- Author
-
BARRETT, NICK
- Subjects
STEEL ,SCARCITY - Published
- 2022
31. Doing Manchester justice.
- Author
-
Barrett, Nick
- Subjects
COURTHOUSE design & construction ,ARCHITECTURE - Abstract
The article features the design and construction of Manchester Civil Justice Centre (MCJC). The steel-framed building of the MCJC was considered as a big success, marking a change from the traditional architectural approach based on its red brick Victorian industrial heritage. The MCJC was designed by Denton Corker Marshall who were praised for extending Manchester's tradition of innovative architecture and urban design.
- Published
- 2008
32. Low-energy electron control over physical and chemical properties of organic aromatic thin layers at the micrometre scale
- Author
-
Wu, Qiang, Sala, Leo, Amiaud, Lionel, Mathieu, Claire, Lubin, Christophe, Lafosse, Anne, Barrett, Nick, Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Amiaud, Lionel
- Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry ,[CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry ,Low energy electron irradiation ,HREELS ,SAM ,work function tuning ,[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] ,chemical modification ,[PHYS.PHYS.PHYS-CHEM-PH] Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] ,LEEM - Abstract
The collimated monochromatic low-energy (≤ 50 eV) electron beam delivered by a low energy electron microscope (LEEM) was used to locally modify organic molecular thin films at the micrometre-scale. Self-Assembled Monolayers (SAMs) of p-terphenylthiol (TPT) anchored on gold substrates were used as model organic layers. The local work function (WF) was observed to decrease as a consequence of electron irradiation and to be tuneable using the irradiation energy and/or the dose as control parameters. The chemical origin of the observed WF changes could be discussed in the light of available vibrational analyses of irradiated TPT SAMs performed using High-Resolution Electron Energy Loss Spectroscopy (HREELS) and by comparing the effective cross sections estimated for WF modulation and for chemical modifications, respectively. The hydrogen content of the organic thin film was shown to be the determining parameter, rather than the degree of aromaticity of the hydrogenated carbon centres. Finally, the imprinted modifications were observed to have a moderate stability after air exposure by combining Photoemission Electron Microscopy (PEEM) and HREELS.
33. School building freed from suspension.
- Author
-
Barrett, Nick
- Subjects
SCHOOL building design & construction ,CONSTRUCTION contracts ,IRON & steel building - Abstract
The article discusses the investment of 1,000 million British pounds for the on site construction of school buildings in 2013 based on the Autumn Financial Statement of Chancellor of the Exchequer George Osborne in December 2012. Education building will benefit from the investment which allegedly prioritises steel construction as a method. It offers a brief description of the Building Schools for the Futures program, the Priority School Building Programme, and the Private Finance Initiative.
- Published
- 2013
34. The case for steel.
- Author
-
Barrett, Nick
- Subjects
IRON & steel building ,STEEL ,CONSTRUCTION materials ,CONSTRUCTION industry - Abstract
The article discusses why building designers in Great Britain choose steel as the primary choice for building material. According to the article, developers, designers and contractors alike opt for the use of steel due to safety considerations. Moreover, steel meets most strict requirements for vibration performance without any special strengthening as well as being the most sustainable among other construction materials.
- Published
- 2008
35. GIANT STEPS TAKEN TOWARDS REDUCED CARBON FOOTPRINTS.
- Author
-
Barrett, Nick
- Subjects
EMISSION control ,SOCIAL responsibility of business ,STEEL industry ,CONTRACTORS - Abstract
The article discusses the efforts of Barrett Steel Buildings to reduce its carbon emissions. The company claims it is the first steelwork contractor in Great Britain to measure and reduce its carbon footprint, in a joint effort with the Steel Construction Institute (SCI) and dCarbon8. Barrett managing director Richard Barrett hopes that the company's move of analyzing its carbon footprint could help other organizations by being a benchmark across the industry. INSET: USING STEEL MAXIMISES RE-USE..
- Published
- 2007
36. STEEL AND SUSTAINABILITY.
- Author
-
Barrett, Nick
- Subjects
SUSTAINABLE buildings ,STRUCTURAL steel ,STRENGTH of materials ,RECYCLABLE material ,IRON & steel building - Abstract
The article presents an overview of the credentials of steel for sustainable development. It is indicated that the most obvious sustainability strength of steel is its ability to be recycled and reused. Constructional steelwork, which is manufactured in factory-controlled conditions, has health and safety benefits to the workforce within the community. It is added that construction programs can also be reduced because of the inherent speed and predictability of steel construction.
- Published
- 2007
37. STEEL'S POPULARITY UNDERPINNED BY COSTS.
- Author
-
Barrett, Nick
- Subjects
CONCRETE construction ,COMMERCIAL building design & construction ,SURVEYS ,COST effectiveness ,CONSTRUCTION materials ,STEEL - Abstract
The article discusses the results of the Cost Comparison Survey, which compares the relative costs of constructing two commercial building in steel and concrete. The study, which was commissioned by Corus, revealed that steel remains the cost effective choice for structural framing solutions. Corus general manager Alan Todd noted that steel remains the leading choice even when only direct costs are considered. The results reinforce the findings of the annual Market Share Survey.
- Published
- 2007
38. CORUS ON ADVANCE.
- Author
-
Barrett, Nick
- Subjects
STRUCTURAL steel - Abstract
The article presents information on the Advance range of structural steel sections from Corus.
- Published
- 2006
39. STEEL FRAMES BRITISH LAND'S SUSTAINABILITY STRATEGY. .
- Author
-
Barrett, Nick
- Subjects
STEELWORK ,EXECUTIVES ,STEEL ,CONTRACTORS - Abstract
The article presents an interview with Richard Elliot, head of construction at property company British Land. He remarks on the role of steel in the projects of the company. According to him, the quality of a manufacturing facility and the straightforwardness of contractors and suppliers are among the qualities that are significant to a steelwork contractor. He hopes to see improvement in communication between designers and steelwork contractors.
- Published
- 2006
40. The commercial buildings market stands ready for the figure.
- Author
-
Barrett, Nick
- Subjects
COMMERCIAL buildings ,COMMERCIAL real estate - Abstract
The article reports on the strengthening of the commercial buildings market in regional cities and towns in England.
- Published
- 2016
41. Structural investigation of the amorphization reaction by mechanical alloying of the Mo50Ni50 system
- Author
-
Cocco, Giorgio, Enzo, Stefano, Barrett, Nick, and Roberts, Kevin J
- Published
- 1989
- Full Text
- View/download PDF
42. Steel stays cost competitive.
- Author
-
Barrett, Nick
- Subjects
STEEL prices ,COST analysis ,STEELWORK ,STEEL supply & demand - Abstract
The article discusses construction consultancy Gardiner & Theobald LLP's (G&T) latest structural steel cost analysis in which it warns that prices for fabricated structural steelwork are expected to rise again in 2015 despite falls in crude oil and iron ore prices. G&T concluded that several types of cost pressures are pushing prices for structural steelwork up from unsustainable levels.
- Published
- 2015
43. City centre landmark.
- Author
-
Barrett, Nick
- Subjects
CONSTRUCTION ,STEELWORK ,STRUCTURAL design ,CONSTRUCTION contracts - Abstract
The article discusses the use of structural steelwork to complete the structural design for St. Vincent Plaza building in Scotland. It states that the building features double height reception area with flexible free spaces on the upper floors. It also notes that the project allow tenants to add additional cabling and ducting for the enlarged space of the building.
- Published
- 2014
44. INTUMESCENTS REDUCING DEVELOPERS' COSTS.
- Author
-
Barrett, Nick
- Subjects
SURFACE coatings ,SEMINARS ,CONSTRUCTION industry - Abstract
Focuses on the offsite application of intumescent coatings, highlighted at a seminar held by the construction industry in London, England. Views of Corus Construction and Industrial executive John Dowling on the popularity of intumescent coatings in 2004; Benefits of the use of intumescent for developers, according to Waterman Partnership senior associate director Barry Dobins; Development of intumescents.
- Published
- 2005
45. Interface-mediated ferroelectric patterning and Mn valency in nano-structured PbTiO3/La0.7Sr0.3MnO3.
- Author
-
Krug, Ingo P., Doganay, Hatice, Nickel, Florian, Gottlob, Daniel M., Schneider, Claus M., Morelli, Alessio, Preziosi, Daniele, Lindfors-Vrejoiu, Ionela, Laskowski, Robert, and Barrett, Nick
- Subjects
- *
NANOSTRUCTURES , *INTERFACIAL roughness , *ELECTRONIC structure , *FERROELECTRIC crystals , *ELECTRONICS - Abstract
We employed a multitechnique approach using piezo-force response microscopy and photoemission microscopy to investigate a self-organizing polarization domain pattern in PbTiO3/La0.7Sr0.3MnO3 (PTO/LSMO) nanostructures. The polarization is correlated with the nanostructure morphology as well as with the thickness and Mn valence of the LSMO template layer. On the LSMO dots, the PTO is upwards polarized, whereas outside the nanodots, the polarization appears both strain and interface roughness dependent. The results suggest that the electronic structure and strain of the PTO/LSMO interface contribute to determining the internal bias of the ferroelectric layer. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
46. Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3.
- Author
-
Nataf, Guillaume F., GuENnou, Mael, Haußmann, Alexander, Barrett, Nick, and Kreisel, JENs
- Subjects
- *
FERROELECTRIC materials , *MAGNESIUM , *CRYSTAL defects , *LITHIUM niobate , *DOPED semiconductors , *RAMAN spectroscopy , *DOMAIN walls (Ferromagnetism) - Abstract
The domain structure of uniaxial ferroelectric lithium niobate single crystals is investigated using Raman spectroscopy mapping. The influence of doping with magnesium and poling at room temperature is studied by analysing frequency shifts at domain walls and their variations with dopant concentration and annealing conditions. It is shown that defects are stabilized at domain walls and that changes in the defect structures with Mg concentration can be probed by the shift of Raman modes. We show that the signatures of polar defects in the bulk and at the domain walls differ. (© 2016 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim) [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
47. Surface polarization, rumpling, and domain ordering of strained ultrathin BaTiO3(001) films with in-plane and out-of-plane polarization.
- Author
-
Dionot, Jelle, Geneste, Grégory, Mathieu, Claire, and Barrett, Nick
- Subjects
- *
OPTICAL polarization , *THIN films , *LATTICE dynamics , *CRYSTAL lattices , *ELECTRONIC structure - Abstract
BaTiO3 ultrathin films (thickness ≈ 1.6 nm) with in- and out-of-plane polarization are studied by first-principles calculations. Out-of-plane polarization is simulated using the method proposed by Shimada et al. [Phys. Rev. B 81, 144116 (2010)], which consists in building a supercell containing small domains with alternating up and down polarization. This allows one to investigate the properties of defect free BaTiO3 ultrathin films with polarization perpendicular to the surface, as a function of in-plane lattice constant, i.e., epitaxial strain. The configurations with polarization perpendicular to the surface (c phase) are found stable under compressive strain, while under tensile strain, the polarization tends to lie in-plane (aa phase), along [110]. In the c phase, the most stable domain width is predicted to be 1 to 2 lattice constants, and the magnitude of the surface rumpling varies according to the direction of the polarization (upwards versus downwards), though its sign is unchanged, the oxygen anions pointing in all cases outwards. Finally, all the surfaces studied are found to be insulating. Analysis of the atom-projected electronic density of states gives insight into the surface contributions to the electronic structure. An important reduction of the Kohn-Sham band gap is predicted at TiO2 terminations in the c phase (≈ 1 eV with respect to the aa phase). The Madelung potential at the surface plays the dominant role in modifications of the surface electronic structure. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
48. A fully oxidized V2O5/TiO2(001)-anatase system studied with in situ synchrotron photoelectron spectroscopy
- Author
-
Silversmit, Geert, Poelman, Hilde, Depla, Diederik, Barrett, Nick, Marin, Guy B., and De Gryse, Roger
- Subjects
- *
MAGNETRONS , *SPECTRUM analysis , *TITANIUM dioxide , *MOLECULAR orbitals , *SYNCHROTRONS - Abstract
Abstract: A V2O5/TiO2(001)-anatase system was prepared with reactive DC magnetron sputtering upon a mineral TiO2(001)-anatase single crystal substrate. The vanadium oxide layer was grown in steps of 2Å up to 30Å and studied with in situ synchrotron ultraviolet photoemission spectroscopy (hν =150eV). From the V3p and valence band spectra it is shown that fully oxidized vanadium oxide layers are deposited for all layer thicknesses. The sputtered V2O5 layers are sensitive to photoreduction under irradiation with the monochromatic synchrotron beam. [Copyright &y& Elsevier]
- Published
- 2005
- Full Text
- View/download PDF
49. UPS study of the thermal reduction of fully oxidized V2O5/TiO2(001)-anatase model catalysts
- Author
-
Silversmit, Geert, Poelman, Hilde, Depla, Diederik, Poelman, Dirk, Barrett, Nick, Marin, Guy B., and Gryse, Roger De
- Subjects
- *
TITANIUM dioxide , *ELECTRON spectroscopy , *MOLECULAR spectroscopy , *MOLECULAR orbitals - Abstract
Abstract: The thermal reduction of thin vanadium oxide layers (8 and 16Å) deposited with magnetron sputtering on mineral anatase TiO2(001) was examined with ultraviolet photoelectron spectroscopy (UPS). Completely oxidized vanadium oxide layers were deposited. During heating, the vanadium oxide layers reduced and evaporated, the thinnest vanadium oxide layer (8Å) even vanished. A re-oxidation of the heated 16Å V2O5/TiO2 could not restore the reduced vanadium oxide completely to V5+. [Copyright &y& Elsevier]
- Published
- 2005
- Full Text
- View/download PDF
50. letters.
- Author
-
Strong, Paul, Gibbons, Alan, Hutt, Jane, Datta, Shouvik, Flynn, Sean, Cramer, Shirley, Holley, Graham, Barrett, Nick, Ferros, Ana, and Day, Glynis
- Subjects
- *
LETTERS to the editor , *EDUCATIONAL finance , *BRITISH education system , *SCHOOL discipline - Abstract
Several letters to the editor are presented in response to articles in previous issues including "More 16-18s face training crisis" in the April 10, 2009 issue, "Laureate bids adieu" in the same issue, and "Behavior training is what heads want" in the April 3, 2009 issue of "The TES Cymru."
- Published
- 2009
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