A Hot Electron Thermocouple and the Diffusion Thermopower of Two-Dimensional Electrons in GaAs

Details A Hot Electron Thermocouple and the Diffusion Thermopower of Two-Dimensional Electrons in GaAs A Hot Electron Thermocouple and the Diffusion Thermopower of Two-Dimensional Electrons in GaAs

2009-03-04

arxiv.org/abs/0903.0835v1

Phys. Rev. Lett. 103, 046807 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 postscript figures

Scientific paper

A simple hot electron thermocouple is realized in a two-dimensional electron system (2DES) and used to measure the diffusion thermopower of the 2DES at zero magnetic field. This hot electron technique, which requires no micron-scale patterning of the 2DES, is much less sensitive than conventional methods to phonon-drag effects. Our thermopower results are in good agreement with the Mott formula for diffusion thermopower for temperatures up to T ~ 2 K.

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