Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Andreev conductance of a domain wall   At low temperatures, the transport through a superconductor-ferromagnet
tunnel interface is due to tunneling of electrons in pairs. Exchange field of a
monodomain ferromagnet aligns electron spins and suppresses the two electron
tunneling. The presence of the domain walls at the SF interface strongly
enhances the subgap current. The Andreev conductance is proven to be
proportional to the total length of domain walls at the SF interface.

27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex