W. E. Chickering, J. P. Eisenstein, J. L. Reno
Published 2009-03-04Version 1
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.
Comments: 4 pages, 3 postscript figures
Journal: Phys. Rev. Lett. 103, 046807 (2009)
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