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The European Physical Journal Special Topics

, Volume 226, Issue 11, pp 2457–2475 | Cite as

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

  • Michael Sing
  • Harald O. Jeschke
  • Frank Lechermann
  • Roser Valentí
  • Ralph Claessen
Open Access
Review
Part of the following topical collections:
  1. Dynamical Mean-Field Approach with Predictive Power for Strongly Correlated Materials

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.

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© The Author(s) 2017

Open Access This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Authors and Affiliations

  • Michael Sing
    • 1
  • Harald O. Jeschke
    • 2
  • Frank Lechermann
    • 3
    • 4
  • Roser Valentí
    • 2
  • Ralph Claessen
    • 1
  1. 1.Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität WürzburgWürzburgGermany
  2. 2.Institut für Theoretische Physik, Goethe-Universtät FrankfurtFrankfurt am MainGermany
  3. 3.I. Institut für Theoretische Physik, Universität HamburgHamburgGermany
  4. 4.Institut für Keramische Hochleistungswerkstoffe, Technische Universität Hamburg-HarburgHamburgGermany

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