Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Slow transverse relaxation of the Zn-neighbor Cu nuclear spins in
  YBa2(Cu{1-x}Znx)4O8   An explanation is given for the recent observation in the plane-site Cu
nuclear quadrupole resonance (NQR) study of a heavily Zn-substituted
YBa$_2$(Cu$_{1-x}$Zn$_x$)$_4$O$_{8}$ that the Cu nuclear spin-spin relaxation
time $T_{2G}$ near the impurity Zn is longer than that away from Zn. The long
$T_{2G}$ of the Zn-neighbor Cu nuclear spins results from a distant coupling
between only a few nuclear spins near Zn, which does not indicate the absence
of local enhancement of the staggered spin susceptibility around Zn.

29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math