The effect of proton ordering in thermal conductivity of clathrate tetrahydrofuran hydrate

• Published in: Физика низких температур
• Date: 2008
• Main Authors: Krivchikov, A.I., Romantsova, O.O., Korolyuk, O.A.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2008
• Subjects: Низкоразмерные и неупорядоченные системы
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/117396
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: The effect of proton ordering in thermal conductivity of clathrate tetrahydrofuran hydrate / A.I. Krivchikov, O.O. Romantsova, O.A. Korolyuk // Физика низких температур. — 2008. — Т. 34, № 8. — С. 821–828. — Бібліогр.: 54 назв. — англ.

The effect of proton ordering in tetrahydrofuran hydrate has been detected using a technique based on measurement of thermal conductivity. The thermal conductivity of tetrahydrofuran hydrate was measured by the steady-state potentiometric method in an interval of 2–150 K. Two regimes were selected to observe the effect: (i) slow cooling of the hydrate sample and (ii) doping the hydrate with a small quantity of KOH alkali to a concentration of 10⁻⁴. Proton ordering affects the temperature dependence of the thermal conductivity changing its glass-like behavior to crystal-like below 150 K. The phonon maximum that appears in the temperature dependence of the thermal conductivity at T = 17 K is attributed to the cooperative process of local proton ordering stimulated by orientational and ionic defects.