Isotope scattering of phonons in superlattices

Article

关键词: ELASTIC-WAVES;    INFINITE;   

DOI  :  10.1103/PhysRevB.56.12440

来源: SCIE

【 摘 要 】

The elastic scattering rate of acoustic phonons in periodic superlattices due to isotopic atoms is calculated in the isotropic, continuum approximation. Unlike the case in bulk solids, the scattering rate depends on both the propagation direction and mode of phonons. Numerical examples are given for AlAs/GaAs and Al/W superlattices for propagation along the normal to the layer interfaces. We find that the scattering of longitudinal phonons is much weaker than that of transverse phonons for wide ranges of frequencies.

【 授权许可】

Free