LONGITUDINAL PHONONS AND HIGH-TEMPERATURE HEAT-CONDUCTION IN GERMANIUM

被引：26

作者：

SOOD, KC ^{[1
]}

ROY, MK ^{[1
]}

机构：

[1] UNIV CHITTAGONG,DEPT PHYS,CHITTAGONG,BANGLADESH

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1993年 / 5卷 / 03期

关键词：

D O I：

10.1088/0953-8984/5/3/006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using the relaxation time approach, we present a new analysis of phonon conductivity which shows that at high temperature (T > theta(D), the Debye temperature), the longitudinal phonons are the dominant heat carriers in germanium. The present result, which is a consequence of the effect of phonon dispersion on the Callaway integral for lattice thermal conductivity, is contrary to the general belief that transverse phonons carry heat at T > theta(D). A qualitative justification has also been given for the three-phonon scattering parameters obtained.

引用

页码：301 / 312

页数：12

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