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періодичних видань НАН України
Deuteration effects in the thermal conductivity of molecular glasses
Репозиторій DSpace/Manakin
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Deuteration effects in the thermal conductivity of molecular glasses
Тема:
Квантовые эффекты в полупроводниках и диэлектриках
Інший ID:
Deuteration effects in the thermal conductivity of molecular glasses / A.I. Krivchikov, F.J. Bermejo, I.V. Sharapova, O.A. Korolyuk, O.O. Romantsova // Физика низких температур. — 2011. — Т. 37, № 6. — С. 651–658. — Бібліогр.: 31 назв. — англ.
Посилання:
Deuteration effects in the thermal conductivity of molecular glasses / A.I. Krivchikov, F.J. Bermejo, I.V. Sharapova, O.A. Korolyuk, O.O. Romantsova // Физика низких температур. — 2011. — Т. 37, № 6. — С. 651–658. — Бібліогр.: 31 назв. — англ.
Підтримка:
The authors are sincerely grateful to V.A. Konstantinov, V.G. Manzhelii, and M.A Strzhemechny for helpful and fruitful discussion and interest in this study.
Дата:
2011
Переглядів:
845
Завантажень:
559
Анотація:
The thermal conductivity κ(T) of pure deuterated ethanol has been measured under its equilibrium vapor pressure in its orientationally-ordered crystal (T = 2 K – Tm), orientational glass and the glass state (T = 2 K – Tg, Tg is the glass transition temperature) solid phases. The temperature dependence of the conductivity is well described by a sum of two contributions: κ(T) = κI(T) + κII(T), where κI(T) account for the heat transport by acoustic phonons and κII(T) for the heat transfer by localized high-frequency excitations respectively. The thermal conductivities of deuterated and hydrogenated ethanols are compared in different phases. The phonon scattering mechanisms in the glasses have been analyzed. In the investigated glasses the effect of complete deuteration shows up as a contribution κII(T).
