Thermoelectric cooling and thermal switching via the non-linear phonon Peltier effect

Bitan De; Bhaskaran Muralidharan

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arXiv · 1707.08248

Thermoelectric cooling and thermal switching via the non-linear phonon Peltier effect

Bitan De·Bhaskaran Muralidharan

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Abstract

Investigating the non-linear transport regime in a quantum dot heat engine described by the Anderson-Holstein model, it is shown that a finite electron-phonon interaction leads to a charge induced phonon generation that stimulates a phonon current even in the absence of a thermal gradient. This gives rise to the non-linear phonon Peltier effect which shows a non-trivial dependence on varying the electron-phonon interaction. Utilizing the reversal of phonon currents via charge induced phonon accumulation, we demonstrate that the heat engine surprisingly can be cooled when coupled to a hot reservoir. In further exploring possibilities that can arise from this effect, we propose a charge-induced phonon switching mechanism.

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Bitan De, Bhaskaran Muralidharan. 2017-07-25. Thermoelectric cooling and thermal switching via the non-linear phonon Peltier effect. https://arxiv.org/abs/1707.08248

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