Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semiclassical theory of the magnetization process of the triangular
  lattice Heisenberg model   Motivated by the numerous examples of 1/3 magnetization plateaux in the
triangular lattice Heisenberg an- tiferromagnet with spins ranging from 1/2 to
5/2, we revisit the semiclassical calculation of the magnetization curve of
that model, with the aim of coming up with a simple method that allows one to
calculate the full mag- netization curve, and not just the critical fields of
the 1/3 plateau. We show that it is actually possible to calculate the
magnetization curve including the first quantum corrections and the appearance
of the 1/3 plateau entirely within linear spin-wave theory, with predictions
for the critical fields that agree to order 1/S with those derived a long-time
ago on the basis of arguments that required to go beyond linear spin-wave
theory. This calculation relies on the central observation that there is a kink
in the semiclassical energy at the field where the classical ground state is
the collinear up-up-down structure, and that this kink gives rise to a locally
linear behavior of the energy with the field when all semiclassical ground
states are compared to each other for all fields. The magnetization curves
calculated in this way for spin 1/2, 1 and 5/2 are shown to be in good
agreement with available experimental data.

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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas