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.
L´evay, Berry’s phase, chaos, and the deformations of riemann surfaces, Phys
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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.