2005/05/17 by Jian Wang, Jian‐Sheng Wang, Wang, Jian +2
Engineering · Materials Science · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #FOS: Physical sciences #Statistical Mechanics (cond-mat.stat-mech) #Thermal properties of materials #Thermography and Photoacoustic Techniques #cond-mat.stat-mech
paper · pdf · doi:10.48550/arxiv.cond-mat/0505401
4 pages with 4 figures
arxiv created 2005/05/17 · openalex publication_date 2005/05/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We derive expressions for energy flow in terms of lattice normal mode coordinates and energy transmission involving reduced group velocities. With a version of Landauer formula appropriate for lattice dynamic approach, the phonon transmission coefficients and thermal conductance are calculated for two kinds of acoustically mismatched junctions: different chirality nanotubes (11,0) to (8,0), and Si-Ge superlattice structure. Our calculation shows a mode-dependent transmission in nanotube junction and a resonantly modulated ballistic thermal conductance in superlattice. The superlattice result suggests a new interpretation of the experimental data. Our approach provides an atomistic way for the calculation of thermal conduction in nanostructure.