Disorder effects on heat transport properties of orientationally disordered crystals

被引：15

作者：

Sharapova, I. V. ^{[1
]}

Krivchikov, A. I. ^{[1
]}

Korolyuk, O. A. ^{[1
]}

Jezowski, A. ^{[2
]}

Rovira-Esteva, M. ^{[3
]}

Tamarit, J. Ll. ^{[3
]}

Pardo, L. C. ^{[3
]}

Ruiz-Martin, M. D. ^{[3
]}

Bermejo, F. J. ^{[4
]}

机构：

[1] NAS Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

[2] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

[3] Univ Politecn Cataluna, ETSEIB, Dept Fis & Engn Nucl, Grp Caracteritzacio Mat, E-08028 Barcelona, Catalonia, Spain

[4] Univ Basque Country, Dept Elect & Elect, CSIC, Bilbao 48080, Spain

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 09期

关键词：

TEMPERATURE THERMAL-CONDUCTIVITY; TUNNELING STATES; GLASS; DYNAMICS; PHONONS; MODES;

D O I：

10.1103/PhysRevB.81.094205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal conductivity k(T) of the orientational glass state of 1,2-difluoro-1,1,2,2-tetrachloroethane (CFCl2-CFCl2, Freon 112) and cyanocyclohexane (C6H11CN) has been measured under equilibrium pressure within the temperature range 2-100 K. The results show that the soft-potential model is able to account for low-temperature data and, indeed, quantitative agreement of all data considered is found within this realm. The details beyond such temperatures are heavily dependent on chemical details and a large plateau is observed for Freon 112 which is rationalized in terms of resonant scattering of phonons by simple oscillators. Such a view is given additional support by the presence of a strong low-frequency feature in the generalized frequency spectrum of the former material as proven by inelastic neutron-scattering spectroscopy.

引用

页数：6

共 50 条

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