Title :
A unified wave-particle treatment for phonon transport in superlattices
Author :
Yang, Bao ; Chen, Gang
Author_Institution :
Mech. & Aerosp. Eng. Dept., Univ. of California, Los Angeles, CA, USA
Abstract :
The phonon thermal conductivity of semiconductor superlattices is calculated with the use of a unified wave-particle model. This model points out that phonons in most semiconductor superlattices of interest are neither pure superlattice modes nor pure bulk modes, but in the mixing-mode regime. The phonons are rationally divided into bulk-like and superlattice-like modes according to the mean free path and the minimum number of periods required to form superlattice bands. The theoretic results are used to explain the thermal conductivity data in both the cross-plane and inplane directions of GaAs/AlAs superlattices.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; phonons; semiconductor superlattices; thermal conductivity; GaAs-AlAs; GaAs/AlAs superlattices; mean free path; mixing-mode regime; phonon thermal conductivity; phonon transport; semiconductor superlattices; unified wave-particle treatment; Aerospace engineering; Dispersion; Laser sintering; Lattices; Mechanical engineering; Particle scattering; Phonons; Photothermal effects; Semiconductor superlattices; Thermal conductivity;
Conference_Titel :
Thermoelectrics, 2002. Proceedings ICT '02. Twenty-First International Conference on
Print_ISBN :
0-7803-7683-8
DOI :
10.1109/ICT.2002.1190326
