Giant improvement of thermoelectric properties of PdS under pressure

Application of pressure can significantly affect the electronic and lattice properties of a material without introducing impurity, especially the transport properties. Measurements of electrical conductivity, Seebeck coefficient, and thermal conductivity under pressure are conducted on PdS. An enhanced electrical conductivity and Seebeck coefficient are observed upon compression. On the contrary, thermal conductivity has a downward trend with increasing pressure. These results demonstrate that the value of zT can be significantly enhanced with the application of pressure in the studied system.