Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Localization in ruthenates: magnetic and electronic properties of
  Ca(2-x)Sr(x)RuO(4)   The electronic structures of the metallic and insulating phases of
Ca(2-x)Sr(x)RuO(4) (0<= x <= 2) are calculated using LDA, LDA+U and Dynamical
Mean-Field Approximation methods. For x=0 the ground state is an orbitally
non-degenerate antiferromagnetic insulator. For 0.2<x<0.5 we propose a state
with partial orbital and spin ordering. For x>0.5 the observed Curie-Weiss
paramagnetic metallic state possessing a local moment with the unexpected spin
S=1/2 is explained by the localization of only two of the three Ru-4d-orbitals.

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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: bayes-an