Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 59: Low-Dimensional Systems: Poster Session
TT 59.20: Poster
Mittwoch, 9. März 2016, 15:00–18:30, Poster D
2DESs at the surface of locally doped insulating titanates studied by ARPES — •Tobias C. Rödel1,2, Franck Fortuna1, François Bertran2, Thomas Maroutian3, Philippe Lecoeur3, Patrick Le Fèvre2, and Andrés Felipe Santander-Syro1 — 1CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France — 2Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin-BP48, 91192 Gif-sur-Yvette, France — 3Institut d’Electronique Fondamentale, Univ. Paris-Sud, CNRS, Université Paris-Saclay, 91405 Orsay, France
Two-dimensional electron systems (2DESs) in transition metal oxides are currently a field of intense research in the quest of novel functionalities in materials showing competing ground states. The 2DESs in SrTiO3-based interfaces have been the cornerstone of such research. The building block of SrTiO3 and other titanates is the oxygen octahedron. Here we show, using (angle-resolved) photoemission spectroscopy in UHV that the stacking order and the rotation of those octahedra determines the order and hybridization of the t2g orbitals as well as the (de)localized character of the excess electrons in 2DESs. To study different lattice configurations, we characterized the 2DESs at the surface of SrTiO3, CaTiO3 and TiO2.