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Antimony telluride doped with small concentrations of vanadium was recently identified as a diluted magnetic semiconductor. We present a study of the heat transport in single crystals of Sb 2Ϫx V x Te 3 with xϭ0, 0.01, 0.02, and 0.03. Thermopower and thermal conductivity were measured from 1.5 K to 300 K. The thermopower is positive for all samples investigated and has a modest dependence on vanadium content. At low temperatures, the lattice thermal conductivity has an approximate T 2doi:10.1103/physrevb.66.125206 fatcat:44mrjq6bk5cx3mweflxgpbgk4y