Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triplet spin resonance of the Haldane compound with interchain coupling   Spin resonance absorption of the triplet excitations is studied
experimentally in the Haldane magnet PbNi2V2O8. The spectrum has features of
spin S=1 resonance in a crystal field, with all three components, corresponding
to transitions between spin sublevels, being observable. The resonance field is
temperature dependent, indicating the renormalization of excitation spectrum in
interaction between the triplets. Magnetic resonance frequencies and critical
fields of the magnetization curve are consistent with a boson version of the
macroscopic field theory [Affleck 1992, Farutin & Marchenko 2007], implying the
field induced ordering at the critical field, while contradict the previously
used approach of noninteracting spin chains.

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The categories of this paper are: funct-an
2
The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc