RT info:eu-repo/semantics/article
T1 Effect of Pressure on the Anomalous Raman Spectrum of CuBr
A1 Manjón, F. J.
A1 Loa, I.
A1 Syassen, K.
A1 Lin, C.T.
A1 Cardona, M.
A1 Serrano Gutiérrez, Jorge
AB Raman spectra of isotopically pure zinc-blende CuBr (63Cu81Br) were measured at T = 10 K under hydrostatic pressures up to 4 GPa. The ambient-pressure spectrum consists of a transverse-optic (TO) phonon line and an anomalous broad band located at frequencies near the expected first-order longitudinal-optic (LO) scattering. Application of hydrostatic pressure leads to an increase of the linewidth of the TO mode and to a significant change of the LO scattering band which above 3 GPa develops into a single LO phonon peak of narrow linewidth. The disappearance of the LO Raman anomaly as well as the broadening of the TO mode with pressure are explained by pressure-dependent third-order anharmonic interactions of zone-center optical phonons with q = 0 two-phonon states.
PB Wiley
SN 0370-1972
YR 2001
FD 2001
LK https://uvadoc.uva.es/handle/10324/65362
UL https://uvadoc.uva.es/handle/10324/65362
LA eng
NO phys. stat. sol. (b) 223, 331 (2001)
DS UVaDOC
RD 02-abr-2025