Yugo Onishi (MIT, USA) - Fundamental Bound on Topolocial Gap

When and where

Starts: Tuesday, 09 April 2024 - 22:08 (in 0 minutes)
Location: Department of Physics, Swiss Federal Institute of Technology Zurich, Zurich, Switzerland

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Event description

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.

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