Thermopower in p-type GaAs/AlGaAs layers

Details Thermopower in p-type GaAs/AlGaAs layers Thermopower in p-type GaAs/AlGaAs layers

2000-04-17

arxiv.org/abs/cond-mat/0004274v1

Physics

Condensed Matter

RevTex, 7 pages (included 2 eps figures). Proceedings of the 24th International Conference on the Physics of Semiconductors, I

Scientific paper

We explain for the first time thermopower data for p-type GaAs/AlGaAs layers. The data span a temperature range between 0.2 to 1.2K. We calculate both the diffusion $S^{d}$ and the phonon-drag $S^{g}$ contributions to the thermopower. We find that $S^{d}$ is significant for temperatures up to 0.3K while at higher temperatures $S^{g}$ dominates. The calculated and measured $S^{g}$ agree very well with no adjustable parameters.

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