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Updated: Oct 14, 2025

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Published on: June 7, 2018
External tuning of topological phase transitions induced by interaction driven mass renormalization
Thies Jansen1, Alexander Brinkman1
1MESA+ Institute for Nanotechnology, University of Twente, The Netherlands.
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 SmB6as a possible playground for experimentally realizing a topological phase transition by external tuning.
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