SciPost Submission Page
Crystalline Weyl semimetal phase in Quantum Spin Hall systems under magnetic fields
by Fernando Dominguez and Benedikt Scharf and Ewelina M. Hankiewicz
|As Contributors:||Fernando Dominguez|
|Submitted by:||Dominguez, Fernando|
|Submitted to:||SciPost Physics|
|Subject area:||Condensed Matter Physics - Theory|
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.