Hot-electron thermocouple and the diffusion thermopower of two-dimensional electrons in GaAs.
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 approximately 2 K.
Chickering
W E
WE
Condensed Matter Physics, California Institute of Technology, Pasadena, California 91125, USA.
Eisenstein
J P
JP
Reno
J L
JL