Influence of oxygen vacancies on two-dimensional electron systems at SrTiO3-based interfaces and surfaces

Medientyp: E-Artikel
Titel: Influence of oxygen vacancies on two-dimensional electron systems at SrTiO3-based interfaces and surfaces
Beteiligte: Sing, Michael [VerfasserIn]; Jeschke, Harald O. [VerfasserIn]; Lechermann, Frank [VerfasserIn]; Valentí, Roser [VerfasserIn]; Claessen, Ralph [VerfasserIn]
Körperschaft: Technische Universität Hamburg ; Technische Universität Hamburg, Institut für Keramische Hochleistungswerkstoffe
Erschienen: 10 July 2017
Erschienen in: European physical journal special topics ; 226(2017), 11, Seite 2457-2475
Sprache: Englisch
DOI: 10.15480/882.2015; 10.1140/epjst/e2017-70059-7
ISSN: 1951-6401
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Beschreibung: The insulator SrTiO3 can host high-mobility two-dimensional electron systems on its surfaces and at interfaces with other oxides. While for the bare surface a two-dimensional electron system can only be induced by oxygen vacancies, it is believed that the metallicity of heterostructure interfaces as in LaAlO3/SrTiO3 is caused by other mechanisms related to the polar discontinuity at the interface. Based on calculations using density functional and dynamical mean-field theory as well as on experimental results using photoemission spectroscopy we elucidate the role of oxygen vacancies, thereby highlighting their importance for the electronic and magnetic properties of the systems under study.
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