Electrical conductivity of cadmium sulfide under high pressure and high temperature

Abstract

The electrical resistance of single crystal cadmium sulfide was measured at pressures up to 40kb and at temperatures up to 700℃ in a cubic compact anvil high pressure apparatus. Both the atmospheric wurtzite phase and the high-pressure rock salt phase are semiconductors. In the high-resistivity samples used the electrical resistance increased with pressure both in the wurtzite and in the rock salt phases. From the measurements of electrical resistance as a function of temperature a band gap of about 2.5eV is obtained for the wurtzite phase. For the rock salt phase a band gap of about 0.8eV is obtained.