Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-Pressure Evolution of the Specific Heat of a Strongly Underdoped
  Ba(Fe0.963Co0.037)As2 Iron-Based Superconductor   We report specific-heat experiments under the influence of high pressure on a
strongly underdoped Co-substituted BaFe2As2 single crystal. This allows us to
study the phase diagram of this iron pnictide superconductor with a bulk
thermodynamic method and pressure as a clean control parameter. The data show
large specific-heat anomalies at the superconducting transition temperature,
which proves the bulk nature of pressure-induced superconductivity. The
transitions in the specific heat are sharper than in resistivity, which
demonstrates the necessity of employing bulk thermodynamic methods to explore
the exact phase diagram of pressure-induced Fe-based superconductors. The Tc at
optimal pressure and the superconducting condensation energy are found to be
larger than in optimally Co-doped samples at ambient pressure, which we
attribute to a weak pair breaking effect of the Co ions.

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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: chao-dyn
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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: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org