Pressure-Raman study of resonant TO(Γ)–two-phonon decay processes in ZnS: Comparison of three isotope compositions
نویسندگان
چکیده
R. E. Tallman, J. Serrano, A. Cantarero, N. Garro, R. Lauck, T. M. Ritter, B. A. Weinstein , and M. Cardona 1 Department of Physics, SUNY at Buffalo, NY 14260-1500, USA 2 Max Plank Institut für Festkörperforschung, 70569 Stutgart, Germany 3 Institut de Ciencia dels Materials, Universtitat de Valencia, E-46071 Valencia, Spain 4 Department of Chemistry and Physics,UNC Pembroke, North Carolina 28372, USA
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Pressure measurements of TO-phonon anharmonicity in isotopic ZnS
We have measured the dependence on pressure of the line-widths of the TO and LO Raman phonons of βZnS. In order to enhance the phenomena observed, and to eliminate possible effects of isotopic disorder, we have measured a nearly isotopically pure crystal, ZnS. The strongly structured pressure effects observed are interpreted on the basis of anharmonic decay and the corresponding two-phonon dens...
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