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Specific Heat of CeRhIn5: Pressure-Driven Evolution of the Ground State from Antiferromagnetism to Superconductivity

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arxiv cond-mat/0109221 v1 pith:CBINIW4W submitted 2001-09-12 cond-mat.str-el

R. A. Fisher , F. Bouquet , N. E. Phillips , M. F. Hundley , P. G. Pagliuso , J. L. Sarrao , Z. Fisk , J. D. Thompson This is my paper · ORCID
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keywords kbargroundheatspecificstateantiferromagneticcerhin5pressure
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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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