Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting Double Transition and the Upper Critical Field Limit of
  Sr2RuO4 in Parallel Magnetic Fields   We studied the specific heat and thermal conductivity of the spin-triplet
superconductor Sr2RuO4 at low temperatures and under oriented magnetic fields
H. We resolved a double peak structure of the superconducting transition under
magnetic field for the first time, which provides thermodynamic evidence for
the existence of multiple superconducting phases. We also found a clear
limiting of the upper critical field Hc2 for the field direction parallel to
the RuO2 plane only within 2 degrees. The limiting of Hc2 occurs in the same
H-T domain of the second superconducting phase; we suggest that the two
phenomena have the same physical origin.

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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio