Proskuryakov, Y. Y., Nicholls, J. T. and Hadji-Ristic, D. I. (2007) Energy-loss rate of a two-dimensional electron gas measured using a mesoscopic thermometer. Physical Review B, 75 (4).
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Using a simple setup, the linear thermopower is measured in etched one-dimensional (1D) constrictions with large subband energy spacings, allowing the temperature of the two-dimensional electron gas on one side of the constriction to be determined as a function of the applied heating power. As tested by the Cutler-Mott relation, the 1D constriction acts as a reliable electron thermometer for lattice temperatures in the range TL=4.2-13 K. The power dissipated per electron, measured as a function of electron temperature, reveals that at TL=4.2 K the acoustic phonon scattering is dominated by T5 behavior due to an unscreened deformation potential. At higher lattice temperatures the scattering can be described by an interpolation between the Gruneisen-Bloch and equipartition regimes.
This is a Submitted version This version's date is: 1/2007 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/4b649f9e-0bed-fcea-8987-baa5dd433f8a/6/
Deposited by Research Information System (atira) on 22-Jul-2014 in Royal Holloway Research Online.Last modified on 22-Jul-2014