Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-component uniform spin susceptibility in superconducting
  HgBa$_{2}$CuO$_{4+\delta}$ single crystals determined with $^{63}$Cu and
  $^{199}$Hg NMR   $^{63}$Cu and $^{199}$Hg NMR shifts for an optimally and underdoped
HgBa$_{2}$CuO$_{4+\delta}$ single crystal are reported, and the temperature
dependence dictates a two-component description of the uniform spin
susceptibility. The first component, associated with the pseudogap phenomenon
in the NMR shifts, decreases already at room temperature and continues to drop
as the temperature is lowered, without a drastic change at the transition
temperature into the superconducting state. The second component is temperature
independent above the superconducting transition temperature and vanishes
rapidly below it. It increases with doping and is a substantial part of the
total spin susceptibility measured at both nuclei.

24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an