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Intraband Collective Excitations and Spatial Correlations in Fractional Chern Insulators

Tobias Wolf1, Yung-Chun Chao2, Allan H MacDonald1

  • 1The University of Texas at Austin, Department of Physics, Austin, Texas 78712, USA.

Physical Review Letters
|April 7, 2025
PubMed
Summary

In fractional Chern insulators, collective excitations are optically dark, coupling weakly to light. This property reveals connections between Chern numbers, quantum geometry, and spatial correlations in these states.

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