Abstract
The electronic, vibrational and thermal properties of stoichiometric and non-stoichiometric cobalt antimonide CoSbx (x = 2.81, 2.875, and 3) are investigated by means of first principle calculations and thermal measurements. The molar heat capacity, electrical conductivity, and the electronic thermal conductivity are increased by the effect of Sb vacancies. Doping with Te and Ge also increases the electrical and thermal conductivity, suggesting that it can be used to enhance cobaltum antimonide as a thermoelectric material.
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