Two-Dimensional Electron Gases atLaAlO3/SrTiO3Interfaces: Orbital Symmetry and Hierarchy Engineered by Crystal Orientation | Zendy

David Pesquera | Zendy; Mateusz Ścigaj | Zendy; Pierluigi Gargiani | Zendy; A. Barla | Zendy; Javier HerreroMartín | Zendy; E. Pellegrin | Zendy; Manuel Valvidares | Zendy; Jaume Gázquez | Zendy; M. Varela | Zendy; N. Dix | Zendy; J. Fontcuberta | Zendy; F. Sánchez | Zendy; G. Herranz | Zendy

Open Access

Two-Dimensional Electron Gases atLaAlO3/SrTiO3Interfaces: Orbital Symmetry and Hierarchy Engineered by Crystal Orientation

Author(s) -

David Pesquera,

Mateusz Ścigaj,

Pierluigi Gargiani,

A. Barla,

Javier HerreroMartín,

E. Pellegrin,

Manuel Valvidares,

Jaume Gázquez,

M. Varela,

N. Dix,

J. Fontcuberta,

F. Sánchez,

G. Herranz

Publication year - 2014

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.113.156802

Subject(s) - symmetry (geometry) , electron , physics , spectroscopy , crystal (programming language) , condensed matter physics , quantum mechanics , computer science , geometry , mathematics , programming language

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

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