Cross-plane thermal conductivity of self-assembled Ge quantum dot superlattices

J. L. Liu; A. Khitun; K. L. Wang; W. L. Liu; G. Chen; Q. H. Xie; S. G. Thomas

doi:10.1103/PhysRevB.67.165333

Cross-plane thermal conductivity of self-assembled Ge quantum dot superlattices

J. L. Liu, A. Khitun, K. L. Wang, W. L. Liu, G. Chen, Q. H. Xie, and S. G. Thomas

Phys. Rev. B 67, 165333 – Published 30 April 2003

Abstract

We report the temperature dependent cross-plane thermal conductivities of Ge quantum dot superlattices measured by the 3ω method. A large reduction in the thermal conductivity of the superlattices compared with that of bulk materials is observed. A simple model taking into account the relaxation time approximation, including phonon scattering on quantum dots, well explains the experimental data.

Received 9 December 2002

DOI:https://doi.org/10.1103/PhysRevB.67.165333

Authors & Affiliations

J. L. Liu^*

Department of Electrical Engineering, University of California at Riverside, Riverside, California 92521

A. Khitun and K. L. Wang

Device Research Laboratory, Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, California 90095-1594

W. L. Liu

Nanoscale Heat Transfer and Thermoelectrics Laboratory, Mechanical and Aerospace Engineering Department, University of California at Los Angeles, Los Angeles, California 90095-1594

G. Chen