2026-04-14T18:19:50Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/653322025-02-13T09:51:34Zcom_10324_1158com_10324_931com_10324_894col_10324_1242
UVaDOC
author
Tallman, R. E.
author
Cantarero, A.
author
Garro, N.
author
Lauck, R.
author
Ritter, T. M.
author
Weinstein, B. A.
author
Cardona, M.
author
Serrano Gutiérrez, Jorge
2024-01-30T12:46:47Z
2024-01-30T12:46:47Z
2004
phys. stat. sol. (b) 241, No. 14, 3143 – 3148 (2004)
0370-1972
https://uvadoc.uva.es/handle/10324/65332
10.1002/pssb.200405221
3143
14
3148
physica status solidi (b)
241
1521-3951
Pressure-Raman studies (to 15 GPa, at 300 K and 16 K) are reported on 64Zn34S, 68Zn32S, and natural ZnS to compare the effects of resonant 3-phonon mixing on the TO(Γ) phonons for the different isotope compositions. Under pressure the TO(Γ) Raman profiles exhibit several distinct features, and a sharp Lorentzian TO(Γ) peak eventually emerges at a threshold pressure PTh that differs for each isotope composition. These effects are due to resonant mixing of the TO(Γ) phonon with TA + LA combination modes. Calculations based on a bond-charge model and perturbation theory reproduce the observed pressure variations in the shape and the width of the TO(Γ) peaks. It is shown that these changes relate to singularities in the TA + LA density of states. Mass scaling of the TO(Γ) and TA + LA modes explains the isotope effect on PTh, and leads to the estimate γLA(W) ∼1.2
eng
Pressure‐Raman study of resonant TO(Γ)–two‐phonon decay processes in ZnS: Comparison of three isotope compositions
info:eu-repo/semantics/article
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IApwb3IgaW5jdW1wbGltaWVudG8gZGUgY3VhbHF1aWVyYSBkZSBsYXMgb2JsaWdhY2lvbmVzIGRlcml2YWRhcyBkZWwgQWN1ZXJkbywgcG9yIHZvbHVudGFkIGV4cHJlc2EgZGVsIEF1dG9yCkVuICBwcnVlYmEgZGUgY29uZm9ybWlkYWQsIGxhcyBwYXJ0ZXMgYWNlcHRhbiBlbCBwcmVzZW50ZSBBY3VlcmRvCgoKCgo=
URL
https://uvadoc.uva.es/bitstream/10324/65332/1/Physica%20Status%20Solidi%20b%20-%202004%20-%20Tallman%20-%20Pressure%e2%80%90Raman%20study%20of%20resonant%20TO%20two%e2%80%90phonon%20decay%20processes%20in%20ZnS%20.pdf
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Physica Status Solidi b - 2004 - Tallman - Pressure‐Raman study of resonant TO two‐phonon decay processes in ZnS .pdf