Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic Impurities in d-wave Superconductors   We solve the problem of a magnetic impurity in a $d_{x^2-y^2}$-wave
superconductor by a variational method. A moment is found to exist in the
superconducting state only if the Kondo-temperature in the normal state is
larger than the maximum in the superconducting gap-function. If a moment exists
in the superconducting state, and provided spin-orbit coupling is non-zero, it
induces a time-reversal breaking superconducting state locally around the
inpurity which is a linear combination of the $d_{x^2-y^2}$ and $d_{xy}$
states. The current pattern around the impurity in this state are evaluated.

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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
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
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: cs
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess