To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy

To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy

From general perspectives, there is no conceptual gap between the structural and orientational glasses. Both kinds of glasses expose universal features during primary relaxation (Low Temp. Phys. 33, 617 (2007)). However, in spite of much efforts made to observe generic two-level systems (TLS) in pol...

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Бібліографічні деталі
Дата:2009
Автор: Kokshenev, Valery B.
Формат: Стаття
Мова:English
Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2009
Назва видання:Физика низких температур
Теми:
7th International Conference on Cryocrystals and Quantum Crystals
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/117109
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy / Valery B. Kokshenev // Физика низких температур. — 2009. — Т. 35, № 4. — С. 371-375. — Бібліогр.: 16 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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spelling irk-123456789-1171092017-05-20T03:03:44Z To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy Kokshenev, Valery B. 7th International Conference on Cryocrystals and Quantum Crystals From general perspectives, there is no conceptual gap between the structural and orientational glasses. Both kinds of glasses expose universal features during primary relaxation (Low Temp. Phys. 33, 617 (2007)). However, in spite of much efforts made to observe generic two-level systems (TLS) in polymers, organic liquids, and plastic crystals via thermodynamic measurements, no similarity unifying glass formers was established. Re-analyzing a number of experimental studies, it is revealed that no renormalization conditions imposed on occupation numbers of structural units, relaxing to the glass state, were taken into consideration by the experimentalists. In this study, the effective-cluster approach is applied to configurational (excess liquid-over-solid) entropy measured in both supercooled liquids and crystals through the heat capacity. As the result, new relationships between the observable thermodynamic and dynamic characteristics are found for molecular liquids, polymers, and networks on the basis of available from the literature data. Thereby, new constraints of structure relaxation are shown to give strong evidence for the existence of TLS-type embryos of glassy structure in all studied glass formers. 2009 Article To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy / Valery B. Kokshenev // Физика низких температур. — 2009. — Т. 35, № 4. — С. 371-375. — Бібліогр.: 16 назв. — англ. 0132-6414 PACS: 61.41.+e, 61.43.Fs, 64.70.P– http://dspace.nbuv.gov.ua/handle/123456789/117109 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic 7th International Conference on Cryocrystals and Quantum Crystals
7th International Conference on Cryocrystals and Quantum Crystals
spellingShingle 7th International Conference on Cryocrystals and Quantum Crystals
7th International Conference on Cryocrystals and Quantum Crystals
Kokshenev, Valery B.
To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
Физика низких температур
description From general perspectives, there is no conceptual gap between the structural and orientational glasses. Both kinds of glasses expose universal features during primary relaxation (Low Temp. Phys. 33, 617 (2007)). However, in spite of much efforts made to observe generic two-level systems (TLS) in polymers, organic liquids, and plastic crystals via thermodynamic measurements, no similarity unifying glass formers was established. Re-analyzing a number of experimental studies, it is revealed that no renormalization conditions imposed on occupation numbers of structural units, relaxing to the glass state, were taken into consideration by the experimentalists. In this study, the effective-cluster approach is applied to configurational (excess liquid-over-solid) entropy measured in both supercooled liquids and crystals through the heat capacity. As the result, new relationships between the observable thermodynamic and dynamic characteristics are found for molecular liquids, polymers, and networks on the basis of available from the literature data. Thereby, new constraints of structure relaxation are shown to give strong evidence for the existence of TLS-type embryos of glassy structure in all studied glass formers.
format Article
author Kokshenev, Valery B.
author_facet Kokshenev, Valery B.
author_sort Kokshenev, Valery B.
title To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
title_short To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
title_full To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
title_fullStr To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
title_full_unstemmed To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
title_sort to the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy
publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
publishDate 2009
topic_facet 7th International Conference on Cryocrystals and Quantum Crystals
url http://dspace.nbuv.gov.ua/handle/123456789/117109
citation_txt To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy / Valery B. Kokshenev // Физика низких температур. — 2009. — Т. 35, № 4. — С. 371-375. — Бібліогр.: 16 назв. — англ.
series Физика низких температур
work_keys_str_mv AT kokshenevvaleryb totheproblemofobservationoftwoleveltunnelingstatesinsupercooledliquidsglassformingpolymersorientationalglassesandmetallicglassesviaconfigurationalentropy
first_indexed 2023-10-18T20:29:02Z
last_indexed 2023-10-18T20:29:02Z
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