Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting gap anisotropy and topological singularities due to
  lattice translational symmetry and their thermodynamic signatures   Symmetry arguments based on the point group of a system and thermodynamic
measurements are often combined to identify the order parameter in
unconventional superconductors. However, lattice translations, which can induce
additional momenta with vanishing order parameter in the Brillouin zone, are
neglected, especially in gap functions otherwise expected to be constant, such
as in chiral superconductors. After a general analysis of the symmetry
conditions for vanishing gap functions, we study the case of chiral $p$- and
chiral $f$-wave pairing on a square lattice, a situation relevant for
Sr$_2$RuO$_4$. Specifically, we calculate the impurity-induced density of
states, specific heat, superfluid density and thermal conductivity employing a
self-consistent T-matrix calculation and compare our results to the case of a
nodal ($d$-wave) order parameter. While there is a clear distinction between a
fully gapped chiral state and a nodal state, the strongly anisotropic case is
almost indistinguishable from the nodal case. Our findings illustrate the
difficulty of interpreting thermodynamic measurements. In particular, we find
that the available measurements are consistent with a chiral ($f$-wave) order
parameter. Our results help to reconcile the thermodynamic measurements with
the overall picture of chiral spin-triplet superconductivity in Sr$_2$RuO$_4$.

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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: nlin
27
The categories of this paper are: comp-gas