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Journal Articles Nature Communications Year : 2015

Harvesting dissipated energy with a mesoscopic ratchet

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Abstract

The search for new efficient thermoelectric devices converting waste heat into electrical energy is of major importance. The physics of mesoscopic electronic transport offers the possibility to develop a new generation of nanoengines with high efficiency. Here we describe an all-electrical heat engine harvesting and converting dissipated power into an electrical current. Two capacitively coupled mesoscopic conductors realized in a two-dimensional conductor form the hot source and the cold converter of our device. In the former, controlled Joule heating generated by a voltage-biased quantum point contact results in thermal voltage fluctuations. By capacitive coupling the latter creates electric potential fluctuations in a cold chaotic cavity connected to external leads by two quantum point contacts. For unequal quantum point contact transmissions, a net electrical current is observed proportional to the heat produced.
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Dates and versions

cea-01366531 , version 1 (14-09-2016)

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B. Roche, P. Roulleau, T. Jullien, Y. Jompol, I. Farrer, et al.. Harvesting dissipated energy with a mesoscopic ratchet. Nature Communications, 2015, 6, pp.6738. ⟨10.1038/ncomms7738⟩. ⟨cea-01366531⟩
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