Fundamental bound on topological gap
Mesoscale and Nanoscale Physics
2024-03-25 v3 Materials Science
Strongly Correlated Electrons
Abstract
We provide a universal tight bound on the energy gap of topological insulators by exploring relationships between topology, quantum geometry, and optical absorption. Applications of our theory to infrared absorption near topological band inversion, magnetic circular dichorism in Chern insulators, and topological gap in moir\'e materials are demonstrated.
Cite
@article{arxiv.2306.00078,
title = {Fundamental bound on topological gap},
author = {Yugo Onishi and Liang Fu},
journal= {arXiv preprint arXiv:2306.00078},
year = {2024}
}
Comments
1+10 pages, 1 figure