Superconductivity in heavy-fermion CeRh2Si2

R. Movshovich; T. Graf; D. Mandrus; J. D. Thompson; J. L. Smith; Z. Fisk

doi:10.1103/PhysRevB.53.8241

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Superconductivity in heavy-fermion CeRh2Si2

R. Movshovich, T. Graf, D. Mandrus, J. D. Thompson, J. L. Smith, Z. Fisk

DOI 10.1103/PhysRevB.53.8241 · Physical Review B

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Abstract

We report the discovery of a superconducting transition in the heavy-fermion compound CeRh2Si2 under hydrostatic pressure. Superconductivity appears at pressures above about 9 kbar, near the critical pressure required to suppress antiferromagnetic order [TN(P=0)=36 K]. Onset of superconductivity occurs at a temperature of ≊350 mK. Resistivity measurements as a function of field at constant temperature allow us to build an H*-T phase diagram for the onset of superconductivity. A Ginzburg-Landau analysis of the initial slope of the critical field leads to an effective mass of m*/m0≊200, supporting the heavy-fermion nature of superconductivity in CeRh2Si2. Magnetic ac susceptibility (χac) shows a diamagnetic response corresponding to about 1% of perfect diamagnetism. The size of the feature in χac also is strongly peaked at a pressure of ≊9 kbar. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeRh2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.35	1.1 GPa	onset
CeRh2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.26	1.1 GPa	midpoint
CeRh2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.35	0.95 GPa	onset
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.5	Pressure unresolved	unknown
CeCu2Ge2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.6	7 GPa	unknown
CePd2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.5	2.5 GPa	unknown