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Radio-Frequency Single-Electron Refrigerator

Jukka P. Pekola·Francesco Giazotto·Olli-Pentti Saira
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Abstract

We propose a cyclic refrigeration principle based on mesoscopic electron transport. Synchronous sequential tunnelling of electrons in a Coulomb-blockaded device, a normal metal-superconductor single-electron box, results in a cooling power of $\sim k_{\rm B}T \times f$ at temperature $T$ over a wide range of cycle frequencies $f$. Electrostatic work, done by the gate voltage source, removes heat from the Coulomb island with an efficiency of $\sim k_{\rm B}T/Δ$, where $Δ$ is the superconducting gap. The performance is not affected significantly by non-idealities, for instance by offset charges. We propose ways of characterizing the system and of its practical implementation.

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Jukka P. Pekola, Francesco Giazotto, Olli-Pentti Saira. 2006-08-03. Radio-Frequency Single-Electron Refrigerator. https://doi.org/10.1103/physrevlett.98.037201

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