Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin dynamics of a tetrahedral cluster magnet   We study the magnetism of a lattice of coupled tetrahedral spin-1/2 clusters
which might be of relevance to the tellurate compounds Cu2Te2O5X2, with X=Cl,
Br. Using the flow equation method we perform a series expansion in terms of
the inter-tetrahedral exchange couplings starting from the quadrumer limit.
Results will be given for the magnetic instabilities of the quadrumer phase and
the dispersion of elementary triplet excitations. In limiting cases of our
model of one- or two dimensional character we show our results to be consistent
with findings on previously investigated decoupled tetrahedral chains and the
Heisenberg model on the 1/5-depleted square lattice.

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The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
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The categories of this paper are: math
34
The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn