Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conductance of partially disordered graphene: Crossover from
  temperature-dependent to field-dependent variable-range hopping   We report and analyze low-temperature measurements of the conductance of
partially disordered reduced graphene oxide, finding that the data follow a
simple crossover scenario. At room temperature, conductance is dominated by
two-dimensional (2D) electric field-assisted, thermally-driven (Pollak-Riess)
variable-range hopping (VRH) through highly-disordered regions. However, at
lower temperatures T, we find a smooth crossover to follow the
exp(-E_0/E)^(1/3) field-driven (Shklovskii) 2D VRH conductance behaviour when
the electric field E exceeds a specific crossover value E_C (T)_2D = (E_a
E_0^(1/3) /3)^(3/4) determined by the scale factors E_0 and E_a for the
high-field and intermediate field regimes respectively. Our crossover scenario
also accounts well for experimental data reported by other authors for
three-dimensional disordered carbon networks, suggesting wide applicability.

16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg