Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meissner effect in diffusive normal metal / d-wave superconductor
  junctions   The Meissner effect in diffusive normal metal / insulator / d-wave
superconductor junctions is studied theoretically in the framework of the
Usadel equation under the generalized boundary condition. The effect of midgap
Andreev resonant states (MARS) formed at the interface of d-wave superconductor
is taken into account. It is shown that the formation of MARS suppresses the
susceptibility of the diffusive normal metal.

5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol