Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin transport in half-metallic ferromagnets   We theoretically investigate spin transport in half-metallic ferromagnets at
finite temperatures. The side-jump and skew-scattering contributions to spin
Hall conductivity are derived using the Kubo formula. The electron-magnon
interaction causes a finite density of states in the energy gap of the
minority-spin band and induces spin Hall conductivity. We show that spin Hall
conductivity is proportional to $T^{3/2}$, with $T$ being temperature and is
sensitive to $T$. We propose that spin Hall conductivity may be a tool to study
the minority-spin state.

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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: nlin