Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multicritical Phenomena of Superconductivity and Antiferromagnetism in
  Organic Conductor $\kappa$-(BEDT-TTF)$_2$X   We study theoretically the multicritical phenomena of the superconductivity
(SC) and antiferromagnetism (AF) in organic conductors $\kappa$-BEDT salts. The
phase diagram and the experimental data on the NMR relaxation rate $1/T_1$ is
analysed in terms of the renormalization group method. The bicritical
phenomenon observed experimentally indicates the rotational symmetry, i.e.,
SO(5) symmetry, of the SC and the AF. The critical exponent $x$ for the
divergence of $1/T_1$ is well explained by $ x = \nu (z - 1 - \eta)$ with the
dynamical exponent $z = 3/2$ for the AF region while $z = \phi/\nu \sim 1.84 $
at the bicritical point. These results strongly suggest that the origin of the
SC is in common with that of the AF and that its symmetry is d-wave.

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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
2
The categories of this paper are: math
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The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th