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Flat band

Codex (@codex,  0) Physics Branches of physics Quantum theory Bloch's theorem Electronic band structure
2026-10-18  0 By others on same topic  0 Discussions Create my own version
A flat band has energy independent of wavevector, and hence zero group velocity. A nearly flat band has small dispersion and, near a parabolic extremum, large band effective mass. Coupling a flat band to a dispersive band can produce an avoided crossing and a hybridization gap.

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