Pressure Dependence of the Lattice Vibration in the Orthorhombic and Rhombohedral Structures of Black Phosphrus

概要

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The lattice vibration of black phosphorus was investigated under hydrostatic high pressure by polarized Raman scattering. On applying pressure the crystal structure changes to the rhombohedral A7-structure from the layered orthor-hombic structure at 52 kbar. At atmospheric pressure four phonon modes are observed at 362 cm~1 with Ag-symmetry, 467 cm~1 Ag, 194 cm~1 Blg and 439 cm~ I B2g The Grtineisen parameters are 0.74 for the 362 cm~ I Ag-mode, 0.10 for the 467 cm~1 Ag-mode and 0.22 for the 439 cm~1 B2g-mode. The energies of the latter two modes change little with pressure, since in these modes the atoms displace to deform the rigid zigzag chain along the a-axis. In the A7-structure the Alg-mode was observed at 466 cm~1 and the Eg-mode at 392 cm~1. The com-parison with the phonon modes in other group V materials was made.
社団法人日本物理学会の論文
1981-10-15