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 fossilized natural resin...
Збережено в:
| Дата: | 2015 |
|---|---|
| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
|
| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/127824 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-127824 |
|---|---|
| record_format |
dspace |
| spelling |
irk-123456789-1278242017-12-29T03:03:02Z 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 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. 2015 Article 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 http://dspace.nbuv.gov.ua/handle/123456789/127824 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 |
10th International Conference on Cryocrystals and Quantum Crystals 10th International Conference on Cryocrystals and Quantum Crystals |
| spellingShingle |
10th International Conference on Cryocrystals and Quantum Crystals 10th International Conference on Cryocrystals and Quantum Crystals Ramos, M.A. Pérez-Castañeda, T. Jiménez-Riobóo, R.J. Rodríguez-Tinoco, C. Rodríguez-Viejo, J. Do tunneling states and boson peak persist or disappear in extremely stabilized glasses? 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. |
| format |
Article |
| 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. |
| author_sort |
Ramos, M.A. |
| title |
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_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_sort |
do tunneling states and boson peak persist or disappear in extremely stabilized glasses? |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2015 |
| topic_facet |
10th International Conference on Cryocrystals and Quantum Crystals |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/127824 |
| 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. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT ramosma dotunnelingstatesandbosonpeakpersistordisappearinextremelystabilizedglasses AT perezcastanedat dotunnelingstatesandbosonpeakpersistordisappearinextremelystabilizedglasses AT jimenezrioboorj dotunnelingstatesandbosonpeakpersistordisappearinextremelystabilizedglasses AT rodrigueztinococ dotunnelingstatesandbosonpeakpersistordisappearinextremelystabilizedglasses AT rodriguezviejoj dotunnelingstatesandbosonpeakpersistordisappearinextremelystabilizedglasses |
| first_indexed |
2023-10-18T20:53:58Z |
| last_indexed |
2023-10-18T20:53:58Z |
| _version_ |
1796151399363379200 |