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Crystalline Weyl semimetal phase in Quantum Spin Hall systems under magnetic fields

by Fernando Dominguez and Benedikt Scharf and Ewelina M. Hankiewicz

Submission summary

As Contributors: Fernando Dominguez
Preprint link: scipost_201905_00005v1
Date submitted: 2019-05-26
Submitted by: Dominguez, Fernando
Submitted to: SciPost Physics
Domain(s): Theoretical
Subject area: Condensed Matter Physics - Theory

Abstract

We investigate an unconventional topological phase transition that occurs in quantum spin Hall (QSH) systems when applying an external in-plane magnetic field. We show that this transition between QSH and trivial insulator phases is separated by a stable topological gapless phase, which is protected by the combination of particle-hole and reflection symmetries, and thus, we dub it as crystalline Weyl semimetal. We explore the stability of this new phase when particle-hole symmetry breaking terms are present. Especially, we predict a robust unconventional topological phase transition to be visible for materials described by Kane and Mele model even if particle-hole symmetry is significantly broken.

Current status:
Editor-in-charge assigned

Submission & Refereeing History

Submission scipost_201905_00005v1 on 26 May 2019

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