Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A revisit to phonon-phonon scattering in single-layer graphene   Understanding the mechanisms of thermal conduction in graphene is a
long-lasting research topic, due to its high thermal conductivity.
Peierls-Boltzmann transport equation (PBTE) based studies have revealed many
unique phonon transport properties in graphene, but most previous works only
considered three-phonon scatterings and relied on interatomic force constants
(IFCs) extracted at 0 K. In this paper, we explore the roles of four-phonon
scatterings and the temperature dependent IFCs on phonon transport in graphene
through our PBTE calculations. We demonstrate that the strength of four-phonon
scatterings would be severely overestimated by using the IFCs extracted at 0 K
compared with those corresponding to a finite temperature, and four-phonon
scatterings are found to significantly reduce the thermal conductivity of
graphene even at room temperature. In order to reproduce the prediction from
molecular dynamics simulations, phonon frequency broadening has to be taken
into account when determining the phonon scattering rates. Our study elucidates
the phonon transport properties of graphene at finite temperatures, and could
be extended to other crystalline materials.

6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th