Radio-Frequency Single-Electron Refrigerator

Details Radio-Frequency Single-Electron Refrigerator Radio-Frequency Single-Electron Refrigerator

2006-07-31

arxiv.org/abs/cond-mat/0607814v2

Phys. Rev. Lett. 98, 037201 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures; corrected typos, language improved

Scientific paper

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 $\sim k_{\rm B}T/\Delta$, where $\Delta$ 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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