Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: General theory of robustness against disorder in multi-band
  superconductors   We investigate the influence of general forms of disorder on the robustness
of superconductivity in multiband materials. Specifically, we consider a
general two-band system where the bands arise from an orbital degree of freedom
of the electrons. Within the Born approximation, we show that the interplay of
the spin-orbital structure of the normal-state Hamiltonian, disorder
scattering, and superconducting pairing potentials can lead to significant
deviations from the expected robustness of the superconductivity. This can be
conveniently formulated in terms of the so-called "superconducting fitness". In
particular, we verify a key role for unconventional $s$-wave states, permitted
by the spin-orbital structure and which may pair electrons that are not
time-reversed partners. To exemplify the role of Fermi surface topology and
spin-orbital texture, we apply our formalism to the candidate topological
superconductor Cu$_x$Bi$_2$Se$_3$, for which only a single band crosses the
Fermi energy, as well as models of the iron pnictides, which possess multiple
Fermi pockets.

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The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph