Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impurity-induced subgap states in superconductors with inhomogeneous
  pairing   We study subgap states induced by a single impurity in an s-wave
superconductor with suppressed pairing. For concreteness, we consider a bulk
superconductor containing a normal spherical region. We find that a point
impurity in this system induces two Yu-Shiba-Rusinov states inside the minigap
instead of one, which one would have in a homogeneous superconductor. Moreover,
the subgap states appear even if the impurity is nonmagnetic. We prove that
this result actually holds almost for any superconductor with a real and
spatially inhomogeneous order parameter, if the quasiparticle spectrum is
gapped.

27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an