Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Josephson Scanning Tunneling Spectroscopy in $d_{x^2-y^2}$-wave
  superconductors: a probe for the nature of the pseudo-gap in the cuprate
  superconductors   Recent advances in the development of Josephson scanning tunneling
spectroscopy (JSTS) have opened a new path for the exploration of
unconventional superconductors. We demonstrate that the critical current,
$I_c$, measured via JSTS, images the spatial form of the superconducting order
parameter in $d_{x^2-y^2}$-wave superconductors around defects and in the
Fulde-Ferrell-Larkin-Ovchinnikov state. Moreover, we show that $I_c$ probes the
existence of phase-incoherent superconducting correlations in the pseudo-gap
region of the cuprate superconductors, thus providing unprecedented insight
into its elusive nature. These results provide the missing theoretical link
between the experimentally measured $I_c$, and the spatial structure of the
superconducting order parameter.

2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex