Fundamental Bound on Topological Gap
Name
PhysRevX.14.011052.pdf
Size
584.96 KB
Format
Adobe PDF
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Author(s)
Onishi, Yugo
Fu, Liang
Date Issued
March 21, 2024
Journal
Physical Review X
Publisher
American Physical Society
Citation
Onishi, Yugo and Fu, Liang. 2024. "Fundamental Bound on Topological Gap." Physical Review X, 14 (1).
Version
Final published version
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 dichroism in Chern insulators, and topological gap in moiré materials are demonstrated.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/physrevx.14.011052
