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dc.contributor.author |
Kokshenev, V.B. |
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dc.date.accessioned |
2017-05-30T15:46:02Z |
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dc.date.available |
2017-05-30T15:46:02Z |
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dc.date.issued |
2011 |
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dc.identifier.citation |
Loosing thermodynamic stability in amorphous materials / V.B. Kokshenev // Физика низких температур. — 2011. — Т. 37, № 5. — С. 551–557. — Бібліогр.: 26 назв. — англ. |
uk_UA |
dc.identifier.issn |
0132-6414 |
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dc.identifier.other |
PACS: 61.41.+e, 61.43.Fs, 64.70.P– |
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dc.identifier.uri |
http://dspace.nbuv.gov.ua/handle/123456789/118550 |
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dc.description.abstract |
The primary relaxation dynamics near the glass transformation temperature T g exhibits universal features in all glass formers, when showing two-level tunneling states (Low Temp. Phys. 35, 282 (2009)). Researchers have long searched for any signature of the underlying “true” ergodic–nonergodic transition emerging at a certain thermodynamic instability temperature Te . Here, the relaxation timescale for glass-forming materials is analyzed within a self-consistent thermodynamic cluster description combined with the cluster percolation concept. Exploring the ergodic hypothesis, its violation is found near a crossover from the Gaussian to non-Gaussian (Poisson) cluster-volume fluctuations, describing the finite-size fractal-cluster distributions. The transformation of the compact-structure “ergodic” clusters into hole-like glassy nanoclusters is attributed to the critical-size thermal fluctuations. The ergodic–nonergodic phase diagram showing Te is predicted in the model-independent form through the glass fragility parameter known for organic and inorganic liquids and amorphous solids. In all cases the ergodic-instability temperature is located below and close to the glass transformation temperature, whereas the distance between the two characteristic temperatures decreases with growing the material fragility. |
uk_UA |
dc.description.sponsorship |
The financial support by CNPq and FAPEMIG is acknowledged. |
uk_UA |
dc.language.iso |
en |
uk_UA |
dc.publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
uk_UA |
dc.relation.ispartof |
Физика низких температур |
|
dc.subject |
8th International Conference on Cryocrystals and Quantum Crystals |
uk_UA |
dc.title |
Loosing thermodynamic stability in amorphous materials |
uk_UA |
dc.type |
Article |
uk_UA |
dc.status |
published earlier |
uk_UA |
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