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Theory of Seebeck ratchet in noncentrosymmetric electron-phonon coupled system

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arxiv 2106.09856 v2 pith:GBHHK3TW submitted 2021-06-18 cond-mat.mes-hall

Theory of Seebeck ratchet in noncentrosymmetric electron-phonon coupled system

classification cond-mat.mes-hall
keywords coupledcurrentelectron-phononelectronsnoncentrosymmetricphononsratchetseebeck
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A thermoelectric effect of the noncentrosymmetric electron-phonon coupled system is proposed, in which a temperature difference between electrons and phonons, instead of a spatial temperature gradient, induces an electric current. This is a realization of Seebeck ratchet in solids with the asymmetric energy dispersion of electrons, and the dynamical phonons act as the fluctuation of the scalar potential and induce the dc current. Possible realizations of this mechanism are also discussed.

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