Correlation effects in (111) bilayers of perovskite transition-metal oxides

Satoshi Okamoto, Wenguang Zhu, Yusuke Nomura, Ryotaro Arita, Di Xiao, Naoto Nagaosa

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

We investigate the correlation-induced Mott, magnetic, and topological phase transitions in artificial (111) bilayers of perovskite transition-metal oxides LaAuO3 and SrIrO3 for which the previous density-functional theory calculations predicted topological insulating states. Using the dynamical-mean-field theory with realistic band structures and Coulomb interactions, LaAuO3 bilayer is shown to be far away from a Mott insulating regime, and a topological-insulating state is robust. On the other hand, SrIrO3 bilayer is on the verge of an orbital-selective topological Mott transition and turns to a trivial insulator by an antiferromagnetic ordering. Oxide bilayers thus provide a novel class of topological materials for which the interplay between the spin-orbit coupling and electron-electron interactions is a fundamental ingredient.

Original languageEnglish
Article number195121
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number19
DOIs
Publication statusPublished - 2014 May 15
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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