TRANSPORT AND DYNAMICS OF NONEQUILIBRIUM PHONONS IN SINGLE-CRYSTAL RUBY FIBERS

被引：9

作者：

BASUN, SA ^{[1
]}

FEOFILOV, SP ^{[1
]}

KAPLYANSKII, AA ^{[1
]}

YEN, WM ^{[1
]}

机构：

[1] UNIV GEORGIA,DEPT PHYS & ASTRON,ATHENS,GA 30602

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.67.3110

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The transport of 29-cm-1 phonons in single-crystal fibers of Al2O3:Cr3+ (ruby) has been investigated at 2 K. The fiber diameters are of the order of the mean free path, so that transport is dominated by diffuse scattering and by acoustic mismatch at the lateral crystal interfaces. Depending on experimental conditions, we have observed ballistic and diffusive phonon transport. We determine for the first time the probability of frequency nonconserving surface scattering for high-frequency phonons.

引用

页码：3110 / 3112

页数：3

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