THERMAL TRANSPORT IN GLASSY SELENIUM - THE ROLE OF LOW-FREQUENCY LIBRATIONS

被引：18

作者：

BERMEJO, FJ

ENCISO, E

CRIADO, A

MARTINEZ, JL

GARCIAHERNANDEZ, M

机构：

[1] UNIV COMPLUTENSE MADRID,DEPT QUIM FIS 1,E-28040 MADRID,SPAIN

[2] UNIV SEVILLA,INST CIENCIA MAT,DEPT FIS MAT CONDENSADA,E-41080 SEVILLE,SPAIN

[3] UNIV AUTONOMA MADRID,FAC CIENCIAS,DEPT FIS APLICADA CIV,INST CIENCIA MAT,E-28049 MADRID,SPAIN

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.49.8689

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The experimental curves giving the temperature dependence of the thermal conductivity of glassy selenium are considered in detail. The observed behavior can be taken into account quantitatively if the densities of states for short-wavelength phonons as well as for low-energy librations arising from computer simulations are used for the calculations. In particular, it is shown that the lowest-frequency excitations of a chain of selenium atoms can give due account of the plateau observed at temperatures about 2-10 K. The implications of the present findings for the current debate regarding the mechanisms for thermal transport in glasses are finally discussed.

引用

页码：8689 / 8695

页数：7

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