0000000000729073

AUTHOR

B. A. Weinstein

showing 2 related works from this author

Pressure measurements of TO-phonon anharmonicity in isotopic ZnS

2004

We have measured the dependence on pressure of the line-widths of the TO and LO Raman phonons of β-ZnS. In order to enhance the phenomena observed, and to eliminate possible effects of isotopic disorder, we have measured a nearly isotopically pure crystal, 68 Zn 32 S. The strongly structured pressure effects observed are interpreted on the basis of anharmonic decay and the corresponding two-phonon density of states.

Condensed matter physicsChemistryPhononHydrostatic pressureAnharmonicityCondensed Matter PhysicsMolecular physicsDiamond anvil cellElectronic Optical and Magnetic Materialslaw.inventionsymbols.namesakePressure measurementlawKinetic isotope effectsymbolsDensity of statesRaman spectroscopyphysica status solidi (b)
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Raman scattering inβ-ZnS

2004

The first- and second-order Raman spectra of cubic ZnS $(\ensuremath{\beta}$-ZnS, zinc-blende) are revisited. We consider spectra measured with two laser lines for samples with different isotopic compositions, aiming at a definitive assignment of the observed Raman features and the mechanisms which determine the linewidth of the first order TO and LO Raman phonons. For this purpose, the dependence of the observed spectra on temperature and pressure is investigated. The linewidth of the TO phonons is found to vary strongly with pressure and isotopic masses. Pressure runs, up to 15 GPa, were performed at 16 K and 300 K. Whereas well-defined TO Raman phonons were observed at low temperature in…

Materials sciencePhononResonanceCondensed Matter PhysicsLaserMolecular physicsSpectral lineElectronic Optical and Magnetic Materialslaw.inventionCondensed Matter::Materials Sciencesymbols.namesakeLaser linewidthNuclear magnetic resonancelawsymbolsRaman spectroscopyRaman scatteringLine (formation)Physical Review B
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