DocumentCode :
2480820
Title :
Heat conduction in alloy-based superlattices
Author :
Chen, Gang ; Yao, Dan-Yang ; Kim, Charles J. ; Zheng, X.Y. ; Liu, Zonglin Liu ; Wang, K.L.
Author_Institution :
Mech. & Aerosp. Eng. Dept., California Univ., Los Angeles, CA
fYear :
1998
fDate :
24-28 May 1998
Firstpage :
202
Lastpage :
205
Abstract :
This work reports experimental studies of the thermal conductivity of alloy-based superlattices. Cross-plane thermal conductivity of a Si/Si0.71Ge0.29 (50 Å/10 Å) superlattice is measured based on the 3ω 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 3ω method for measuring both the cross-plane and the in-plane thermal conductivity of superlattices, a 2-wire 3ω method is developed. Preliminary experimental results are reported for a AlAs/Al0.62Ga0.38As (455 Å/410 Å) thick layer superlattice based on this method
Keywords :
Ge-Si alloys; III-V semiconductors; aluminium compounds; elemental semiconductors; gallium arsenide; heat conduction; semiconductor materials; semiconductor superlattices; silicon; thermal conductivity; 10 A; 2-wire 3ω method; 410 A; 455 A; 50 A; AlAs-Al0.62Ga0.38As; AlAs/Al0.62Ga0.38As; Fourier heat conduction; Si-Si0.71Ge0.29; Si/Si0.71Ge0.29; alloy-based superlattices; cross-plane thermal conductivity; heat conduction; in-plane thermal conductivity; Boltzmann equation; Conductivity measurement; Gallium arsenide; Material properties; Phonons; Scattering; Superlattices; Temperature measurement; Temperature sensors; Thermal conductivity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
ISSN :
1094-2734
Print_ISBN :
0-7803-4907-5
Type :
conf
DOI :
10.1109/ICT.1998.740352
Filename :
740352
Link To Document :
بازگشت