EVIDENCE FOR 2-DIMENSIONAL PHONONS IN A THIN METAL-FILM

被引：25

作者：

NABITY, JC

WYBOURNE, MN

机构：

[1] Materials Science Institute, University of Oregon, Eugene

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.44.8990

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper we describe an experiment that uses a moderate dc electric field to heat electrons in a thin metal film that can have its acoustic coupling to the surroundings changed in situ. The acoustic coupling is found to have a substantial effect on the electron-heating characteristics. This illustrates the importance of considering phonon escape from the film in this type of experiment. Using a rate equation to model the data obtained for different conditions of phonon escape from the film, we have found that in certain circumstances there is strong evidence to suggest that low-frequency phonons in the film are two dimensional.

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收藏

页码：8990 / 8996

页数：7

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