Optical absorption peaks and generalized Hall conductivity provide signatures of band flatness, bandwidth, gaps, and Berry curvature properties in magic-angle twisted bilayer graphene, tied to conditions for superconductivity and fractional Chern phases.
Zeng et al., Thermodynamic evidence of fractional chern in- sulator in moir´e MoTe2, Nature 622, 69 (2023)
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Optical Signatures of Band Flatness and Anisotropic Quantum Geometry in Magic-Angle Twisted Bilayer Graphene
Optical absorption peaks and generalized Hall conductivity provide signatures of band flatness, bandwidth, gaps, and Berry curvature properties in magic-angle twisted bilayer graphene, tied to conditions for superconductivity and fractional Chern phases.