A Single-Quantum-Dot Heat Valve

Abstract

We demonstrate gate control of electronic heat flow in a thermally-biased single-quantum-dot junction. Electron temperature maps taken in the immediate vicinity of the junction, as a function of the gate and bias voltages applied to the device, reveal clearly defined Coulomb diamond patterns revealing a maximum heat transfer right at the charge degeneracy point. The non-trivial bias and gate dependence of this heat valve results from both the quantum nature of the dot at the heart of device and its strong coupling to leads.

arXiv comment11 pages, 11 figures, to appear in Phys. Rev. Lett

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• Thermoelectric transport within density functional theory
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• Thermoelectric study of the time-dependent Resonant Level Model
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• The reverse flow and amplification of heat in a quantum-dot system