Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gapless Fermi Surfaces in anisotropic multiband superconductors in
  magnetic field   We propose that a new state with a fully gapless Fermi surface appears in
quasi-2D multiband superconductors in magnetic field applied parallel to the
plane. It is characterized by a paramagnetic moment caused by a finite density
of states on the open Fermi surface. We calculate thermodynamic and magnetic
properties of the gapless state for both s-wave and d-wave cases, and discuss
the details of the 1-st order metamagnetic phase transition that accompanies
the appearance of the new phase in s-wave superconductors. We suggest possible
experiments to detect this state both in the s-wave (2-H NbSe2) and d-wave
(CeCoIn5) superconductors.

1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin