Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross-band versus intra-band pairing in superconductors: signatures and
  consequences of the interplay   We analyze the paradigmatic competition between intra-band and cross-band
Cooper-pair formation in two-band superconductors, neglected in most works to
date. We derive the phase-sensitive gap equations and describe the crossover
between the intraband-dominated and the crossband-dominated regimes, delimited
by a ``gapless'' state. Experimental signatures of crosspairing comprise
notable gap-splitting in the excitation spectrum, non-BCS behavior of gaps
versus temperature, as well as changes in the pairing symmetry as a function of
temperature. The consequences of these findings are illustrated on the examples
of MgB$_2$ and Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$.

15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio