2018/09/30 by Zhun-Yong Ong · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.5048234
published as Journal of Applied Physics 124, 151101 (2018) · 16 pages, 8 figures
arxiv created 2018/10/17 · arxiv updated 2018/10/18
At the nanoscale, thermal transport across the interface between two lattice insulators can be described by the transmission of bulk phonons and depends on the crystallographic structure of the interface and the bulk crystal lattice. In this tutorial, we give an account of how an extension of the Atomistic Green's Function (AGF) method based on the concept of the Bloch matrix can be used to model the transmission of individual phonon modes and allow us to determine the wavelength and polarization dependence of the phonon transmission. Within this framework, we can explicitly establish the relationship between the phonon transmission coefficient and dispersion. Details of the numerical methods used in the extended AGF method are provided. To illustrate how the extended AGF method can be applied to yield insights into individual phonon transmission, we study the (16,0)/(8,0) carbon nanotube intramolecular junction. The method presented here sheds light on the modal contribution to interfacial thermal transport between solids.