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Electronic Refrigeration of a Two-Dimensional Electron Gas

J. R. Prance, C. G. Smith, J. P. Griffiths, S. J. Chorley, D. Anderson, G. A. C. Jones, I. Farrer, and D. A. Ritchie
Phys. Rev. Lett. 102, 146602 – Published 6 April 2009
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Abstract

Measurements are presented of a device designed to cool a 6μm2 region of 2D electron gas using quantum dots. Electrostatic effects are found to be significant in the device, and a model that accounts for them is developed. At ambient electron temperatures above 120 mK the results are consistent with the model and the base temperature of the cooled region is estimated. At an ambient electron temperature of 280 mK, the 6μm2 region is found to be cooled below 190 mK. Below 120 mK the results deviate from predictions, which is attributed to reduced electron-electron scattering rates.

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  • Received 12 November 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.146602

©2009 American Physical Society

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Electronic refrigeration on the micron scale

Published 6 April 2009

A quantum dot refrigerator that cools an electron gas close to 100mK may allow experimentalists to better probe electron-electron interactions in quantum confined systems.

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Authors & Affiliations

J. R. Prance*, C. G. Smith, J. P. Griffiths, S. J. Chorley, D. Anderson, G. A. C. Jones, I. Farrer, and D. A. Ritchie

  • Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom

  • *jp376@cam.ac.uk

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Issue

Vol. 102, Iss. 14 — 10 April 2009

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