Do tunneling states and boson peak persist or disappear in extremely stabilized glasses?
We review and concurrently discuss two recent works conducted by us, which apparently give opposite results.
 Specifically, we have investigated how extreme thermal histories in glasses can affect their universal properties
 at low temperatures, by studying: (i) amber, the fossiliz...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2015 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses?
 / M.A. Ramos, T. Pérez-Castañeda, R.J. Jiménez-Riobóo, C. Rodríguez-Tinoco, J. Rodríguez-Viejo // Физика низких температур. — 2015. — Т. 41, № 6. — С. 533-540. — Бібліогр.: 45 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862540355912597504 |
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| author | Ramos, M.A. Pérez-Castañeda, T. Jiménez-Riobóo, R.J. Rodríguez-Tinoco, C. Rodríguez-Viejo, J. |
| author_facet | Ramos, M.A. Pérez-Castañeda, T. Jiménez-Riobóo, R.J. Rodríguez-Tinoco, C. Rodríguez-Viejo, J. |
| citation_txt | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses?
 / M.A. Ramos, T. Pérez-Castañeda, R.J. Jiménez-Riobóo, C. Rodríguez-Tinoco, J. Rodríguez-Viejo // Физика низких температур. — 2015. — Т. 41, № 6. — С. 533-540. — Бібліогр.: 45 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We review and concurrently discuss two recent works conducted by us, which apparently give opposite results.
Specifically, we have investigated how extreme thermal histories in glasses can affect their universal properties
at low temperatures, by studying: (i) amber, the fossilized natural resin, which is a glass which has experienced
a hyperaging process for about one hundred million years; and (ii) ultrastable thin-film glasses of
indomethacin. Specific heat Cp measurements in the temperature range 0.07 K < T < 30 K showed that the
amount of two-level systems, assessed from the linear term at the lowest temperatures, was exactly the same for
the pristine hyperaged amber glass as for the subsequently rejuvenated samples, whereas just a modest increase
of the boson-peak height (in Cp/T³) with increasing rejuvenation was observed, related to a corresponding increase
of the Debye coefficient. On the other hand, we have observed an unexpected suppression of the two-level
systems in the ultrastable glass of indomethacin, whereas conventionally prepared thin films of the same material
exhibit the usual linear term in the specific heat below 1 K ascribed to these universal two-level systems in
glasses. By comparing both highly-stable kinds of glass, we conclude that the disappearance of the tunneling
two-level systems in ultrastable thin films of indomethacin may be due to the quasi-2D and anisotropic behavior
of this glass, what could support the idea of a phonon-mediated interaction between two-level systems.
|
| first_indexed | 2025-11-24T16:07:13Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-127824 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-24T16:07:13Z |
| publishDate | 2015 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Ramos, M.A. Pérez-Castañeda, T. Jiménez-Riobóo, R.J. Rodríguez-Tinoco, C. Rodríguez-Viejo, J. 2017-12-28T15:18:18Z 2017-12-28T15:18:18Z 2015 Do tunneling states and boson peak persist or disappear in extremely stabilized glasses?
 / M.A. Ramos, T. Pérez-Castañeda, R.J. Jiménez-Riobóo, C. Rodríguez-Tinoco, J. Rodríguez-Viejo // Физика низких температур. — 2015. — Т. 41, № 6. — С. 533-540. — Бібліогр.: 45 назв. — англ. 0132-6414 :PACS: 65.60.+a, 64.70.P–, 63.50.Lm, 81.40.Cd https://nasplib.isofts.kiev.ua/handle/123456789/127824 We review and concurrently discuss two recent works conducted by us, which apparently give opposite results.
 Specifically, we have investigated how extreme thermal histories in glasses can affect their universal properties
 at low temperatures, by studying: (i) amber, the fossilized natural resin, which is a glass which has experienced
 a hyperaging process for about one hundred million years; and (ii) ultrastable thin-film glasses of
 indomethacin. Specific heat Cp measurements in the temperature range 0.07 K < T < 30 K showed that the
 amount of two-level systems, assessed from the linear term at the lowest temperatures, was exactly the same for
 the pristine hyperaged amber glass as for the subsequently rejuvenated samples, whereas just a modest increase
 of the boson-peak height (in Cp/T³) with increasing rejuvenation was observed, related to a corresponding increase
 of the Debye coefficient. On the other hand, we have observed an unexpected suppression of the two-level
 systems in the ultrastable glass of indomethacin, whereas conventionally prepared thin films of the same material
 exhibit the usual linear term in the specific heat below 1 K ascribed to these universal two-level systems in
 glasses. By comparing both highly-stable kinds of glass, we conclude that the disappearance of the tunneling
 two-level systems in ultrastable thin films of indomethacin may be due to the quasi-2D and anisotropic behavior
 of this glass, what could support the idea of a phonon-mediated interaction between two-level systems. The Laboratorio de Bajas Temperaturas (UAM) is an associated
 unit with the ICMM-CSIC. This work was financially
 supported by the Spanish MINECO, under FIS2011-
 23488, MAT2012-37276-C03-01 and MAT2010-15202
 projects en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур 10th International Conference on Cryocrystals and Quantum Crystals Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? Article published earlier |
| spellingShingle | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? Ramos, M.A. Pérez-Castañeda, T. Jiménez-Riobóo, R.J. Rodríguez-Tinoco, C. Rodríguez-Viejo, J. 10th International Conference on Cryocrystals and Quantum Crystals |
| title | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| title_full | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| title_fullStr | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| title_full_unstemmed | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| title_short | Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| title_sort | do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| topic | 10th International Conference on Cryocrystals and Quantum Crystals |
| topic_facet | 10th International Conference on Cryocrystals and Quantum Crystals |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/127824 |
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