Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective "Penetration Depth" in the Vortex State of a d-wave
  Superconductor   The temperature and field dependence of the effective magnetic penetration
depth in the vortex state of a d-wave superconductor, as measured by muon spin
rotation experiments, is calculated using a nonlocal London model. We show that
at temperatures below T^* \propto \sqrt{B}, the linear T-dependence of the
effective penetration depth crosses over to a T^3-dependence. This could
provide an explanation for the low temperature flattening of the effective
penetration depth curves observed in a recent muon spin rotation experiment.

15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math