Correlation-Induced Band Competition in SrTiO3/LaAlO3

Eran Maniv, Yoram Dagan, Moshe Goldstein

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The oxide interface SrTiO3/LaAlO3 supports a 2D electron liquid displaying superconductivity and magnetism, while allowing for a continuous control of the electron density using a gate. Our recent measurements have shown a similar surprising nonmonotonic behavior as function of the gate voltage (carrier density) of three quantities: The superconducting critical temperature and field, the inverse Hall coefficient, and the frequency of quantum oscillations. While the total density has to be monotonic as function of gate, the last result indicates that one of the involved bands has a nonmontonic occupancy as function of the chemical potential. We show how electronic interactions can lead to such an effect, by creating a competition between the involved bands and making their sturcture non-rigid, and thus account for all these effects. Adding Fock terms to our previous Hartree treatment makes this scenario even more generic.

Original languageEnglish
Pages (from-to)1243-1248
Number of pages6
JournalMRS Advances
Volume2
Issue number23
DOIs
StatePublished - 1 Jan 2017
Externally publishedYes

Keywords

  • Electronic structure
  • magnetoresistance (transport)
  • superconducting

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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