Thermopower in p-type GaAs/AlGaAs layers
  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. 
M. Tsaousidou (1), P.N. Butcher (1), P.A. Crump (2), R.J. Hyndman (2),   B.L. Gallagher(2) ((1)University of Warwick, Englan...