Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergent interacting spin islands in a depleted strong-leg Heisenberg
  ladder   Properties of the depleted Heisenberg spin ladder material series
(C$_7$H$_{10}$N)$_2$Cu$_{1-z}$Zn$_{z}$Br$_4$ have been studied by the
combination of magnetic measurements and neutron spectroscopy. Disorder-induced
degrees of freedom lead to a specific magnetic response, described in terms of
emergent strongly interacting "spin island" objects. The structure and dynamics
of the spin islands is studied by high-resolution inelastic neutron scattering.
This allows to determine their spatial shape and to observe their mutual
interactions, manifested by strong spectral in-gap contributions.

26
The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-fin