Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phonon Scattering at Kinks in Suspended Graphene   Recent experiments have shown surprisingly large thermal time constants in
suspended graphene ranging from 10 to 100 ns in drums with a diameter ranging
from 2 to 7 microns. The large time constants and their scaling with diameter
points towards a thermal resistance at the edge of the drum. However, an
explanation of the microscopic origin of this resistance is lacking. Here, we
show how phonon scattering at a kink in the graphene, e.g. formed by sidewall
adhesion at the edge of the suspended membrane, can cause a large thermal time
constant. This kink strongly limits the fraction of flexural phonons that cross
the suspended graphene edge, which causes a thermal interface resistance at its
boundary. Our model predicts thermal time constants that are of the same order
of magnitude as experimental data, and shows a similar dependence on the
circumference. Furthermore, the model predicts the relative in-plane and
out-of-plane phonon contributions to graphene's thermal expansion force, in
agreement with experiments. We thus show, that in contrast to conventional
thermal (Kapitza) resistance which occurs between two different materials, in
2D materials another type of thermal interface resistance can be geometrically
induced in a single material.

29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph