Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs
  and Au/LiFeAs Point-Contact Spectroscopy   We have fabricated c-axis point contact junctions between high-quality LiFeAs
single crystals and Pb or Au tips in order to study the nature of the
superconducting order parameter of LiFeAs, one of the few stoichiometric
iron-based superconductors. The observation of the Josephson current in c-axis
junctions with a conventional s-wave superconductor as the counterelectrode
indicates that the pairing symmetry in LiFeAs is not pure d-wave or pure
spin-triplet p-wave. A superconducting gap is clearly observed in point contact
Andreev reflection measurements performed on both Pb/LiFeAs and Au/LiFeAs
junctions. The conductance spectra can be well described by the
Blonder-Tinkham-Klapwijk model with a lifetime broadening term, resulting in a
gap value of \approx 1.6 meV (2{\Delta}/kBTC \approx 2.2).

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The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin