Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence of Doping-Dependent Pairing Symmetry in Cuprate Superconductors   Scanning tunneling spectroscopy (STS) studies reveal long-range spatial
homogeneity and predominantly $d_{x^2-y^2}$-pairing spectral characteristics in
under- and optimally doped $\rm YBa_2Cu_3O_{7-\delta}$ superconductors, whereas
STS on $\rm YBa_2(Cu_{0.9934}Zn_{0.0026}Mg_{0.004})_3O_{6.9}$ exhibits {\it
microscopic} spatial modulations and strong scattering near the Zn or Mg
impurity sites, together with global suppression of the pairing potential. In
contrast, in overdoped $\rm (Y_{0.7}Ca_{0.3})Ba_2Cu_3O_{7-\delta}$,
$(d_{x^2-y^2}+s)$-pairing symmetry is found, suggesting significant changes in
the superconducting ground-state at a critical doping value.

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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an