Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter

Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter

The phonon scattering processes in the three solid phases of ethanol are investigated using thermal conductivity, light, and neutron-scattering measurements as well as molecular dynamics simulations on single- crystalline models for two crystalline modifications (fully ordered monoclinic and orien...

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Published in:Физика низких температур
Date:2007
Main Authors: Bermejo, F.J., Fernández-Perea, R., Cabrillo, C., Krivchikov, A.I., Yushchenko, A.N., Manzhelii, V.G., Korolyuk, O.A., González, M.A., Jimenez-Ruiz, M.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2007
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Online Access:https://nasplib.isofts.kiev.ua/handle/123456789/121796
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Journal Title:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Cite this:Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter / F.J. Bermejo, R. Fernández-Perea, C. Cabrillo, A.I. Krivchikov, A.N. Yushchenko, V.G. Manzhelii, O.A. Korolyuk, M.A. González, M. Jimenez-Ruiz // Физика низких температур. — 2007. — Т. 33, № 6-7. — С. 790-797. — Бібліогр.: 13 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id nasplib_isofts_kiev_ua-123456789-121796
record_format dspace
spelling Bermejo, F.J.
Fernández-Perea, R.
Cabrillo, C.
Krivchikov, A.I.
Yushchenko, A.N.
Manzhelii, V.G.
Korolyuk, O.A.
González, M.A.
Jimenez-Ruiz, M.
2017-06-16T08:11:05Z
2017-06-16T08:11:05Z
2007
Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter / F.J. Bermejo, R. Fernández-Perea, C. Cabrillo, A.I. Krivchikov, A.N. Yushchenko, V.G. Manzhelii, O.A. Korolyuk, M.A. González, M. Jimenez-Ruiz // Физика низких температур. — 2007. — Т. 33, № 6-7. — С. 790-797. — Бібліогр.: 13 назв. — англ.
0132-6414
PACS: 66.70.+f; 65.60.+a; 61.43.–j; 63.50.+x; 63.20.Ls
https://nasplib.isofts.kiev.ua/handle/123456789/121796
The phonon scattering processes in the three solid phases of ethanol are investigated using thermal conductivity, light, and neutron-scattering measurements as well as molecular dynamics simulations on single- crystalline models for two crystalline modifications (fully ordered monoclinic and orientationally disordered bcc phases). The orientationally disordered crystal is found to exhibit a temperature dependence of the thermal conductivity that is remarkably close to that of a structurally disordered solid, especially at low temperatures. This results, together with measurements of Brillouin linewidths as derived from light scattering measurements, emphasize the role of orientational disorder in phonon scattering. The experimental results obtained on polycrystal samples are then discussed with the aid of computer simulations on single-crystalline models of both bcc and monoclinic crystals. Our findings are in good agreement with the wealth of thermodynamic and dynamic data available so far, but at variance with the inferences drawn from inelastic x-ray data on polycrystalline samples, where a common nature for the excitations in all phases is postulated.
The authors are indebted to the Fundamental Research Foundation of Ukraine (Project F-16/1-2006) for a partial support of this study. The study was partially supported with a Grant of President of Ukraine for young scientists engaged in scientific research (GP/F13/0037).
en
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
Физика низких температур
Related Topics
Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
Article
published earlier
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
title Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
spellingShingle Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
Bermejo, F.J.
Fernández-Perea, R.
Cabrillo, C.
Krivchikov, A.I.
Yushchenko, A.N.
Manzhelii, V.G.
Korolyuk, O.A.
González, M.A.
Jimenez-Ruiz, M.
Related Topics
title_short Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
title_full Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
title_fullStr Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
title_full_unstemmed Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
title_sort quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
author Bermejo, F.J.
Fernández-Perea, R.
Cabrillo, C.
Krivchikov, A.I.
Yushchenko, A.N.
Manzhelii, V.G.
Korolyuk, O.A.
González, M.A.
Jimenez-Ruiz, M.
author_facet Bermejo, F.J.
Fernández-Perea, R.
Cabrillo, C.
Krivchikov, A.I.
Yushchenko, A.N.
Manzhelii, V.G.
Korolyuk, O.A.
González, M.A.
Jimenez-Ruiz, M.
topic Related Topics
topic_facet Related Topics
publishDate 2007
language English
container_title Физика низких температур
publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
format Article
description The phonon scattering processes in the three solid phases of ethanol are investigated using thermal conductivity, light, and neutron-scattering measurements as well as molecular dynamics simulations on single- crystalline models for two crystalline modifications (fully ordered monoclinic and orientationally disordered bcc phases). The orientationally disordered crystal is found to exhibit a temperature dependence of the thermal conductivity that is remarkably close to that of a structurally disordered solid, especially at low temperatures. This results, together with measurements of Brillouin linewidths as derived from light scattering measurements, emphasize the role of orientational disorder in phonon scattering. The experimental results obtained on polycrystal samples are then discussed with the aid of computer simulations on single-crystalline models of both bcc and monoclinic crystals. Our findings are in good agreement with the wealth of thermodynamic and dynamic data available so far, but at variance with the inferences drawn from inelastic x-ray data on polycrystalline samples, where a common nature for the excitations in all phases is postulated.
issn 0132-6414
url https://nasplib.isofts.kiev.ua/handle/123456789/121796
citation_txt Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter / F.J. Bermejo, R. Fernández-Perea, C. Cabrillo, A.I. Krivchikov, A.N. Yushchenko, V.G. Manzhelii, O.A. Korolyuk, M.A. González, M. Jimenez-Ruiz // Физика низких температур. — 2007. — Т. 33, № 6-7. — С. 790-797. — Бібліогр.: 13 назв. — англ.
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first_indexed 2025-12-07T17:10:39Z
last_indexed 2025-12-07T17:10:39Z
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