Phase transitions in black phosphorus at low temperature and high pressure

Abstract

Phase transitions in black phosphorus have been studied with synchrotron radiation at 21 K and high pressures; the transition pressures at 21 K were much higher than those at 77 K. The P-T phase diagram of black phosphorus was determined at low temperatures and high pressures. The relation between the crystal structure and the superconducting transition temperature of the phosphorus is discussed.