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Paper detail

Degeneracy-projected polarization formulas for Hall-type conductivities

Kubo formulas for Hall, transverse thermoelectric and thermal Hall conductivities are simplified into on-shell commutators of degeneracy projected polarizations. The new expressions are computationally economical, and apply to general Hamiltonians without a gap restriction. We show that Hall currents in open boundaries are carried by gapless chiral excitations. Extrapolation of finite lattice calculations to the DC-thermodynamic limit is demonstrated for a disordered metal.

preprint2022arXivOpen access
Noga BashanAssa Auerbach
cond-mat.str-el
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Noga BashanAssa Auerbach

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