Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Order-Parameter Anisotropies in the Pnictides - An Optimization
  Principle for Multi-Band Superconductivity   Using general arguments of an optimization taking place between the pair wave
function and the repulsive part of the electron-electron interaction, we
analyze the superconducting gap in materials with multiple Fermi-surface (FS)
pockets, with exemplary application to two proto-type ferropnictide setups. On
the basis of functional renormalization group (FRG) calculations for a wide
parameter span of the bare interactions, we show that the symmetry of the gap
and the nodal versus nodeless behavior is driven by this optimization
requirement.

26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
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The categories of this paper are: eess
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
2
The categories of this paper are: math