期刊
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
卷 133, 期 11, 页码 -出版社
ASME-AMER SOC MECHANICAL ENG
DOI: 10.1115/1.4004400
关键词
phonon; Green's function; polarization-specific; transmission function
资金
- Air Force Research Laboratory (AFRL)
- DARPA's IMPACT Center
In this work, the atomistic Green's function method is extended to compute transmission functions for each phonon polarization. The eigenvectors and eigenvalues of the overall density of states matrices are manipulated to yield a density of states matrix for each polarization. A decomposed self-energy is calculated from the density of states matrix for each polarization and used to calculate the transmission function for a particular phonon branch. In a pure bulk material such as silicon, each transmission function exhibits a frequency-independent value of unity. In heterogeneous bulk materials, the transmission function is reduced significantly due to the junction of dissimilar materials. [DOI: 10.1115/1.4004400]
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