Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Limited role of vortices in transport in highly disordered
  superconductors near $B_{c2}$   At finite temperatures and magnetic fields, type-II superconductors in the
mixed state have a non-zero resistance that is overwhelmingly associated with
vortex motion. In this work we study amorphous indium oxide films, which are
thicker than the superconducting coherence length, and show that near $B_{c2}$
their resistance in the presence of perpendicular and in-plane magnetic fields
becomes almost isotropic. Up to a linear rescaling of the magnetic fields both
the equilibrium resistance as well as the non-equilibrium current-voltage
characteristics are insensitive to magnetic field orientation suggesting that,
for our superconductors, there is no fundamental difference in transport
between perpendicular and in-plane magnetic fields. Additionally we show that
this near-isotropic behavior extends to the insulating phase of amorphous
indium oxide films of larger disorder strength that undergo a magnetic field
driven superconductor-insulator transition. This near-isotropic behavior raises
questions regarding the role of vortices in transport and the origin of
resistance in thin-film superconductors.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an