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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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2009 |
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| Sprache: | Englisch |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
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| Zitieren: | 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| _version_ | 1862685811186597888 |
|---|---|
| author | Kokshenev, Valery B. |
| author_facet | Kokshenev, Valery B. |
| 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. |
| collection | DSpace DC |
| container_title | 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.
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| first_indexed | 2025-12-07T16:02:51Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-117109 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T16:02:51Z |
| publishDate | 2009 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Kokshenev, Valery B. 2017-05-19T19:23:55Z 2017-05-19T19:23:55Z 2009 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– https://nasplib.isofts.kiev.ua/handle/123456789/117109 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. The financial support by CNPq is acknowledged. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур 7th International Conference on Cryocrystals and Quantum Crystals To the problem of observation of two-level tunneling states in supercooled liquids, glass-forming polymers, orientational glasses, and metallic glasses via configurational entropy Article published earlier |
| spellingShingle | 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 |
| 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_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_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_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 |
| topic | 7th International Conference on Cryocrystals and Quantum Crystals |
| topic_facet | 7th International Conference on Cryocrystals and Quantum Crystals |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/117109 |
| work_keys_str_mv | AT kokshenevvaleryb totheproblemofobservationoftwoleveltunnelingstatesinsupercooledliquidsglassformingpolymersorientationalglassesandmetallicglassesviaconfigurationalentropy |