Search for the minimum thermal conductivity in mixed cryocrystals (CH₄)₁₋ξ Krξ

• Published in: Физика низких температур
• Date: 2001
• Main Authors: Konstantinov, V.A., Manzhelii, V.G., Revyakin, V.P., Pohl, R.O.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2001
• Subjects: Статьи, посвященные столетию со дня рождения Л. В. Шубникова
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/129269
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Search for the minimum thermal conductivity in mixed cryocrystals (CH₄)₁₋ξ Krξ / V.A. Konstantinov , V.G. Manzhelii, V.P. Revyakin, R.O. Pohl // Физика низких температур. — 2001. — Т. 27, № 9-10. — С. 1159-1169. — Бібліогр.: 30 назв. — англ.

The isochoric thermal conductivity of (CH4)1-ξ Krξ solid solutions is studied between 40 K and ~ 150 K 
 
 over the wide range of concentrations (ξ = 0.013, 0.032, 0.07, 0.115, 0.34, 0.71, 0.855, 
 
 0.937, and 0.97). A gradual transition from the thermal conductivity of a highly perfect 
 
 crystal to the minimum thermal conductivity is observed as the crystal becomes increasingly 
 
 more disordered. A qualitative description is given in the framework of Debye model of 
 
 thermal conductivity, which takes into consideration the fact that phonon mean free path 
 
 cannot decrease indefinitely.