Spin texture as a bulk indicator of fragile topology

Lange, Gunnar F; Bouhon, Adrien; Slager, Robert-Jan

Spin texture as a bulk indicator of fragile topology

Authors

Lange, Gunnar F

Bouhon, Adrien

Slager, Robert-Jan

Publisher

American Physical Society (APS)
Department of Physics
https://doi.org/10.1103/physrevresearch.5.033013

Description

We study the relationship between momentum-space spin textures projected onto the occupied bands and Wilson loop winding, proving a map between band topology and spin topology in certain restricted symmetry settings relevant to fragile topology. Our results suggest that, in specific scenarios, the spin gap may act as a smoking gun bulk indicator for fragile topology.