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Two-dimensional electron gases at LaAIO_3/SrTiO_3 interfaces: orbital symmetry and hierarchy engineered by crystal orientation

Authors :
Pesquera, D.
Scigaj, M.
Gargiani, P.
Barla, A.
Herrero-Martín, J.
Pellegrin, E.
Valvidares, S. M.
Gázquez Alabart, Jaume
Varela del Arco, María
Dix, N.
Fontcuberta Griñó, Josep
Sánchez Barrera, Florencio
Herranz Casabona, Gervasi
Source :
E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, Physical review letters, 113 (2014): 156802. doi:10.1103/PhysRevLett.113.156802, info:cnr-pdr/source/autori:Pesquera, D.; Scigaj, M.; Gargiani, P.; Barla, A.; Herrero-Martin, J.; Pellegrin, E.; Valvidares, S. M.; Gazquez, J.; Varela, M.; Dix, N.; Fontcuberta, J.; Sanchez, F.; Herranz, G./titolo:Two-Dimensional Electron Gases at LaAlO3%2FSrTiO3 Interfaces: Orbital Symmetry and Hierarchy Engineered by Crystal Orientation/doi:10.1103%2FPhysRevLett.113.156802/rivista:Physical review letters (Print)/anno:2014/pagina_da:156802/pagina_a:/intervallo_pagine:156802/volume:113, E-Prints Complutense. Archivo Institucional de la UCM, instname
Publication Year :
2014
Publisher :
American Physical Society, 2014.

Abstract

Recent findings show the emergence of two-dimensional electron gases (2DEGs) at LaAIO_3/SrTiO_3 interfaces along different orientations; yet details on band reconstructions have remained so far unknown. Via x-ray linear dichroism spectroscopy, we demonstrate that crystal symmetry imposes distinctive 2DEG orbital hierarchies on (001)-and (110)-oriented quantum wells, allowing selective occupancy of states of different symmetry. Such orientational tuning expands the possibilities for electronic engineering of 2DEGs and opens up enticing opportunities to understand the link between orbital symmetry and complex correlated states at LaAIO_3/SrTiO_3 quantum wells.

Details

Database :
OpenAIRE
Journal :
E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, Physical review letters, 113 (2014): 156802. doi:10.1103/PhysRevLett.113.156802, info:cnr-pdr/source/autori:Pesquera, D.; Scigaj, M.; Gargiani, P.; Barla, A.; Herrero-Martin, J.; Pellegrin, E.; Valvidares, S. M.; Gazquez, J.; Varela, M.; Dix, N.; Fontcuberta, J.; Sanchez, F.; Herranz, G./titolo:Two-Dimensional Electron Gases at LaAlO3%2FSrTiO3 Interfaces: Orbital Symmetry and Hierarchy Engineered by Crystal Orientation/doi:10.1103%2FPhysRevLett.113.156802/rivista:Physical review letters (Print)/anno:2014/pagina_da:156802/pagina_a:/intervallo_pagine:156802/volume:113, E-Prints Complutense. Archivo Institucional de la UCM, instname
Accession number :
edsair.dedup.wf.001..0b8e233d1fadfa60284019f1069cf15e
Full Text :
https://doi.org/10.1103/PhysRevLett.113.156802