Thermal and elastic properties of black phosphorus

Temperature dependence of specific heat at constant pressure, and temperature and hydrostatic pressure dependence of elastic constants have been measured on single crystals of black phosphorus. Elastic softening is observed in c 55 with decreasing temperature. The elastic constants c 11 , c 22 and c 33 increase with pressure up to 6–7 kbar. Deformation potential effect in this system is discussed.

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