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

Michael Sing, Harald Olaf Jeschke, Frank Lechermann, Roser Valentí, Ralph Claessen

Research output: Contribution to journalReview article

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2457-2475
Number of pages19
JournalEuropean Physical Journal: Special Topics
Volume226
Issue number11
DOIs
Publication statusPublished - Jul 1 2017
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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