S. Q. Zhou, G. Chen, J. L. Liu, X. Y. Zheng, K. L. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Recent experimental and theoretical studies demonstrate that the thermal conductivity of superlattices can be significantly reduced due to the interface phonon scattering. These studies raise the interesting possibility of phonon engineering to control the thermal conductivity of nanostructures for thermoelectric, thermionic, and microelectronic applications. Experimental evidences of a significant thermal conductivity reduction have been reported for GaAs/AlAs, Si/Ge, and Bi2Te3/Sb2Te3superlattices. In this work, we present experimental results on the anisotropic thermal conductivity of a Si/Si0.71Ge0.29(50A/10A) superlattice measured by a 2-wire 3ω method. The experimental results show that both the cross-plane and the in-plane thermal conductivities of the Si/Si0.71Ge0.29superlattice are reduced by a factor of three compared to the predictions of the Fourier heat conduction theory. These reductions are not as large as that observed in pure Si/Ge superlattices of comparable thickness, which can be explained by the smaller mismatch in material properties between Si and Si0.71Ge0.29than those between Si and Ge. This work provides preliminary experimental evidence supporting the idea of controlling the thermophysical properties of low-dimensional structures through phonon engineering.

Original languageEnglish
Title of host publicationHeat Transfer
Subtitle of host publicationVolume 4 � Heat Transfer in Materials Processing
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages6
ISBN (Electronic)9780791826737
Publication statusPublished - 1998
EventASME 1998 International Mechanical Engineering Congress and Exposition, IMECE 1998 - Anaheim, United States
Duration: 1998 Nov 151998 Nov 20

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)


ConferenceASME 1998 International Mechanical Engineering Congress and Exposition, IMECE 1998
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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