Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Method to Detect the Transport Scattering Mechanisms of Graphene
  Carriers   Detecting the carrier scattering mechanisms in a materials system is
important for transport related science and engineering. The approaches of fast
laser process and electrical conductivity matching were used in previous
literature, which do not give accurate information on scattering relaxation
time as a function of carrier energy for intrinsic photon-free transport.
Graphene is considered as a model system in materials science studying for its
simple atomic and electronic structures. Here we have developed a new
methodology to detect the scattering relaxation time as a function of carrier
energy, which can be used to infer the carrier scattering mechanisms at
different temperatures. Our method utilizes the measured values of optimal
Seebeck coefficient, for both P-type and N-type materials. This new approach
can eliminate the influence from photon-carrier scattering in the fast-laser
method, and avoid the over-fitting issue in the electrical conductivity
matching method. We have then applied the new approach in the SiO2 substrated
graphene system, and discovered that the Dirac carriers are mainly scattered by
short-range interactions at 40 K. The scatter strength of long-range Coulomb
interaction increases with temperature. At 300 K, the long-range and
short-range interactions scatter the Dirac carriers with almost comparable
strengths.

7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol