Search

Your search keyword '"BLYTH R. I., R"' showing total 120 results
Start Over Author "BLYTH R. I., R"
120 results on '"BLYTH R. I., R"'

1. Interface reconstruction in V-oxide heterostructures determined by x-ray absorption spectroscopy

Author

Wadati, H., Hawthorn, D. G., Geck, J., Regier, T. Z., Blyth, R. I. R., Higuchi, T., Hotta, Y., Hikita, Y., Hwang, H. Y., and Sawatzky, G. A.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

We present an x-ray absorption study of the dependence of the V oxidation state on the thickness of LaVO$_3$ (LVO) and capping LaAlO$_3$ (LAO) layers in the multilayer structure of LVO sandwiched between LAO. We found that the change of the valence of V as a function of LAO layer thickness can be qualitatively explained by a transition between electronically reconstructed interfaces and a chemical reconstruction. The change as a function of LVO layer thickness is complicated by the presence of a considerable amount of V$^{4+}$ in the bulk of the thicker LVO layers., Comment: 11 pages, 4 figures

Published
2009
Full Text
View/download PDF

5. The effect of the surface of SnO2 nanoribbons on their luminescence using x-ray absorption and luminescence spectroscopy.

Author

Zhou, X. T., Zhou, J. G., Murphy, M. W., Ko, J. Y. P., Heigl, F., Regier, T., Blyth, R. I. R., and Sham, T. K.

Subjects
SPECTRUM analysis, X-rays, LUMINESCENCE spectroscopy, PHOTOLUMINESCENCE, ENERGY transfer, ELECTRONS
Abstract

X-ray excited optical luminescence (XEOL) and x-ray absorption near-edge structure in total electron, x-ray fluorescence, and photoluminescence yields at Sn M5,4-, O K-, and Sn K-edges have been used to study the luminescence from SnO2 nanoribbons. The effect of the surface on the luminescence from SnO2 nanoribbons was studied by preferential excitation of the ions in the near-surface region and at the normal lattice positions, respectively. No noticeable change of luminescence from SnO2 nanoribbons was observed if the Sn ions in the near-surface region were excited selectively, while the luminescence intensity changes markedly when Sn or O ions at the normal lattice positions were excited across the corresponding edges. Based on the experimental results, we show that the luminescence from SnO2 nanoribbons is dominated by energy transfer from the excitation of the whole SnO2 lattice to the surface states. Surface site specificity is not observable due to its low concentration and weak absorption coefficient although the surface plays an important role in the emission as a luminescence center. The energy transfer and site specificity of the XEOL or the lack of the site specificity from a single-phase sample is discussed. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF

6. Band alignment in organic devices: Photoemission studies of model oligomers on In[sub 2]O[sub 3].

Author

Blyth, R. I. R., Duschek, R., Koller, G., Netzer, F. P., and Ramsey, M. G.

Subjects
*OLIGOMERS, *PHOTOEMISSION
Abstract

The interfaces of In[sub 2]O[sub 3], a model for indium-tin-oxide (ITO), with benzene, thiophene, and benzaldehyde, models for technologically important organic molecules, are studied using angle resolved ultraviolet photoemission and work function measurements. Band alignment diagrams for hypothetical Al/organic/ITO devices have been drawn, using values determined from this work and previously published studies of these molecules on Al(111). The similarity between the bonding of benzene and thiophene on Al(111) and In[sub 2]O[sub 3], i.e., largely electrostatic, leads to near identical alignment at both metal and oxide interfaces. This indicates that clean Al and ITO will make a very poor electron/hole injecting pair. We suggest that the apparent efficiency of Al as an electron injecting contact in real devices is due to the presence of oxygen at the Al/organic interface. For benzaldehyde the interaction with In[sub 2]O[sub 3] is largely electrostatic, in contrast to the covalent bonds formed on Al(111). This leads to very different alignment at the Al and oxide interfaces, showing the importance of the particular organic-inorganic interaction in determining band alignment. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2001
Full Text
View/download PDF

12. LaVO 4 : Eu Phosphor films with enhanced Eu solubility

Author

Higuchi, T., primary, Hotta, Y., additional, Hikita, Y., additional, Maruyama, S., additional, Hayamizu, Y., additional, Akiyama, H., additional, Wadati, H., additional, Hawthorn, D. G., additional, Regier, T. Z., additional, Blyth, R. I. R., additional, Sawatzky, G. A., additional, and Hwang, H. Y., additional

Published
2011
Full Text
View/download PDF

20. Time Resolved Studies of ZnO (Eu) Nanostructure Luminescence Using Short Synchrotron Radiation Pulses

Author

Heigl, F., primary, Jürgensen, A., additional, Zhou, X.-T., additional, Murphy, M., additional, Ko, J. Y. P., additional, Lam, S., additional, Sham, T. K., additional, Regier, T., additional, Blyth, R. I. R., additional, Coulthard, I., additional, Zuin, L., additional, Hu, Y.-F., additional, Armelao, L., additional, Gordon, R., additional, and Brewe, D., additional

Published
2007
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results