Topological Quantum Spin Hall Semimetals with Light
Mesoscale and Nanoscale Physics
2025-08-19 v2 Strongly Correlated Electrons
Abstract
We introduce a quantum spin Hall semimetal or Fermi liquid characterized with a Z2 topological invariant, measurable through circularly polarized light. We propose its engineering through two topological metallic band structures in crystals on the honeycomb lattice, with spin-orbit interaction, realizable through the interplay of a charge or spin density wave substrate and Zeeman effects, in between a quantum spin Hall and a quantum anomalous Hall insulator. These systems show topologically protected helical edge or photo-induced currents.
Cite
@article{arxiv.2412.07304,
title = {Topological Quantum Spin Hall Semimetals with Light},
author = {Karyn Le Hur},
journal= {arXiv preprint arXiv:2412.07304},
year = {2025}
}