Heat conduction in alloy-based superlattices

被引：29

作者：

Chen, G ^{[1
]}

Zhou, SQ ^{[1
]}

Yao, DY ^{[1
]}

Kim, CJ ^{[1
]}

Zheng, XY ^{[1
]}

Liu, ZL ^{[1
]}

Wang, KL ^{[1
]}

Sun, X ^{[1
]}

Dresselhaus, MS ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Aerosp & Mech Engn, Los Angeles, CA 90095 USA

来源：

XVII INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS ICT 98 | 1998年

关键词：

D O I：

10.1109/ICT.1998.740352

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This work reports experimental studies of the thermal conductivity of alloy-based superlattices. Cross-plane thermal conductivity of a Si/Si0.71Ge0.29 (50 Angstrom/10 Angstrom) superlattice is measured based on the 3 omega method. The measured thermal conductivity of this superlattice is 2-3 times smaller than that calculated from the Fourier heat conduction. This reduction in thermal conductivity is smaller than those observed in pure Si/Ge superlattices, possibly due to the smaller mismatch of the material properties between Si and Si0.71Ge0.29 as compared to between Si and Ge. To extend the 3w method for measuring both the cross-plane and the in-plane thermal conductivity of superlattices, a 2-wire 3 omega method is developed. Preliminary experimental results are reported fora AlAs/Al0.62Ga0.38As (455 Angstrom/410 Angstrom) thick layer superlattice based on this method.

引用

页码：202 / 205

页数：4