RT info:eu-repo/semantics/article
T1 Effect of Pressure on the Anomalous Raman Spectrum of CuBr
A1 Manj�n, 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 22-nov-2024