Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple-gap structure in electric-field-induced surface
  superconductivity   Local superconducting gap structure is studied as a function of nanoscale
depth in electric-field-induced surface superconductivity such as in SrTiO3. We
examine solutions of Bogoliubov-de Gennes equation in two limiting confinement
potential cases of electric field with and without screening effects. As unique
properties different from bulk superconductivity, there appear in-gap states
even for isotropic s-wave pairing, due to multiple gap structure of sub-band
dependent surface superconductivity. These determine the depth-dependence of
local superconductivity.

24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int