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Electronic Refrigeration of a Two-Dimensional Electron Gas

Research output: Contribution to journalJournal article

Published
  • J. R. Prance
  • C. G. Smith
  • J. P. Griffiths
  • S. J. Chorley
  • D. Anderson
  • G. A. C. Jones
  • I. Farrer
  • D. A. Ritchie
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Article number146602
<mark>Journal publication date</mark>10/04/2009
<mark>Journal</mark>Physical review letters
Issue number14
Volume102
Number of pages4
Pages (from-to)-
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Measurements are presented of a device designed to cool a 6 mu m(2) 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 6 mu m(2) 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.