Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Specific Heat of CeRhIn5: Pressure-Driven Evolution of the Ground State
  from Antiferromagnetism to Superconductivity   Measurements of the specific heat of antiferromagnetic CeRhIn5, to 21 kbar,
and for 21 kbar to 70 kOe, show a discontinuous change from an
antiferromagnetic ground state below 15 kbar to a superconducting ground state
above, and suggest that it is accompanied by a weak thermodynamic first-order
transition. Bulk superconductivity appears, apparently with d-wave electron
pairing, at the critical pressure, 15 kbar; with further increase in pressure a
residual temperature-proportional term in the specific heat disappears.

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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
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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: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg