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arXiv · 2012.11970

Symmetry-induced even/odd parity in charge and heat pumping

Miguel A. N. Araújo·Pedro Ninhos·Pedro Ribeiro
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Abstract

It is shown that the presence of discrete symmetries in Floquet systems connected to metallic reservoirs imprints a definite parity on the charge and heat pumping as a function of the reservoir's chemical potential, $\mu$. In particular, when particle-hole symmetry (PHS) holds, the pumping of charge (heat) is an odd (even) function of $\mu$. Whereas, if only the product of PHS and parity symmetry is present, pumping of charge (heat) is even (odd) in $\mu$. Our results also extend to the presence of other unitary symmetries and provide a simple criterion for reversing (or maintaining) the direction of the flow. We illustrate our findings using two variants of the Su-Schrieffer-Heeger model under a time-periodic perturbation.

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Miguel A. N. Araújo, Pedro Ninhos, Pedro Ribeiro. 2020-12-22. Symmetry-induced even/odd parity in charge and heat pumping. https://doi.org/10.1103/physrevb.103.174307

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