Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin chirality ordering and anomalous Hall effect in the ferromagnetic
  Kondo lattice model on the triangular lattice   We investigate the ground-state phase diagram for the ferromagnetic Kondo
lattice model on a triangular lattice by a variational calculation for various
spin orderings up to a four-site unit cell. We find that a noncoplanar
four-sublattice ordering with a finite scalar spin chirality emerges at and
around 1/4 filling, in addition to the 3/4-filled case, which was predicted to
be induced by the perfect nesting of the Fermi surface [I. Martin and C. D.
Batista: Phys. Rev. Lett. {\bf 101} (2008) 156402]. The 1/4-filling phase is
stable in a wider range of parameters than the 3/4-filling one, and includes a
large region of gapped insulating state characterized by a Chern number. We
also compute the Hall conductivity in the chiral-ordered phases.

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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: cs