Abstract
Measurements are presented of a device designed to cool a 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 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.
- Received 12 November 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.146602
©2009 American Physical Society
Viewpoint
Electronic refrigeration on the micron scale
Published 6 April 2009
A quantum dot refrigerator that cools an electron gas close to may allow experimentalists to better probe electron-electron interactions in quantum confined systems.
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