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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2016

Nanowire-based thermoelectric ratchet in the hopping regime

Abstract

We study a thermoelectric ratchet consisting of an array of disordered nanowires arranged in parallel on top of an insulating substrate, and contacted asymmetrically to two electrodes. Transport is investigated in the Mott hopping regime, when localized electrons can propagate through the nanowires via thermally assisted hops. When the electronic temperature in the nanowires is different from the phononic one in the substrate, we show that a finite electrical current is generated even in the absence of driving forces between the electrodes. We discuss the device performance both as an energy harvester, when an excess heat from the substrate is converted into useful power, and as a refrigerator, when an external power is supplied to cool down the substrate.
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Dates and versions

hal-01219184 , version 1 (22-10-2015)
hal-01219184 , version 2 (04-04-2016)

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Riccardo Bosisio, Geneviève Fleury, Jean-Louis Pichard, Cosimo Gorini. Nanowire-based thermoelectric ratchet in the hopping regime. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93, pp.165404. ⟨hal-01219184v2⟩
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