2026-04-27T01:37:44Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/653622025-02-13T09:44:52Zcom_10324_1158com_10324_931com_10324_894col_10324_1242
Effect of Pressure on the Anomalous Raman Spectrum of CuBr
Manjón, F. J.
Loa, I.
Syassen, K.
Lin, C.T.
Cardona, M.
Serrano Gutiérrez, Jorge
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.
2024-01-30
2024-01-30
2001
info:eu-repo/semantics/article
phys. stat. sol. (b) 223, 331 (2001)
0370-1972
https://uvadoc.uva.es/handle/10324/65362
10.1002/1521-3951(200101)223:1<331::AID-PSSB331>3.0.CO;2-E
331
1
336
physica status solidi (b)
223
1521-3951
eng
info:eu-repo/semantics/openAccess
Wiley