External tuning of topological phase transitions induced by interaction driven mass renormalization

Thies Jansen*, Alexander Brinkman

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Electron-electron interactions can be useful for realizing new nontrivial topological phases of matter. Here, we show by means of a tight-binding model and mean field theory how electron-electron interactions can lead to a topological phase transition. By externally adding or removing electrons from the system a band inversion between two bands with different parity is induced. This leads to a topological nontrivial phase if spin-orbit coupling is present. Besides the toy-model illustrating this mechanism, we also propose SmB6 as a possible playground for experimentally realizing a topological phase transition by external tuning.

Original languageEnglish
Article number075601
JournalJournal of physics: Condensed matter
Volume34
Issue number7
DOIs
Publication statusPublished - 16 Feb 2022

Keywords

  • SmB
  • electron-electron interactions
  • external tuning
  • mean field theory
  • spin-orbit coupling
  • tight-binding model
  • topology
  • SmB6

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