Abstract
The resistance of polycrystalline lead sulfide was measured at temperatures of up to 500 K and pressures of up to 5 GPa using a purpose-designed experimental setup. The resistance jump across the phase transition was found to strongly depend on temperature. The band gap of the low-pressure phase was evaluated as a function of pressure. The resistance of the high-pressure phase was shown to exhibit semiconducting behavior, and the band gap of this phase was determined.
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