Formation of anti-site defects and bismuth overstoichiometry in p-type Sb2−xBixTe3 thermoelectric crystalsG. Kavei and M. A. KaramiEur. Phys. J. Appl. Phys., 42 2 (2008) 67-73DOI: https://doi.org/10.1051/epjap:2008040