Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical angle for interfacial phonon scattering: Results from ab initio
  lattice dynamics calculations   Thermal boundary resistance is a critical quantity that controls heat
transfer at the nanoscale, which is primarily related to interfacial phonon
scattering. Here, we combine lattice dynamics calculations and inputs from
first principles ab initio simulations to predict phonon transmission at the
Si/Ge interface as a function of both the phonon frequency and the phonon
wavevector. This technique allows us to determine the overall thermal
transmission coefficient as a function of the phonon scattering direction and
frequency. Our results show that the thermal energy transmission is highly
anisotropic, while thermal energy reflection is almost isotropic. In addition,
we found the existence of a global critical angle of transmission beyond which
almost no thermal energy is transmitted. This critical angle around 50 degrees
is found to be almost independent of the interaction range between Si and Ge,
the interfacial bonding strength, and the temperature above 30 K. We interpret
these results by carrying out a spectral and angular analysis of the phonon
transmission coefficient and differential thermal boundary conductance.

29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th