Partially gapped Fermi surface in the heavy-electron superconductor URu2Si2

M. B. Maple; J. W. Chen; Y. Dalichaouch; T. Kohara; C. Rossel; M. S. Torikachvili; M. W. McElfresh; J. D. Thompson

doi:10.1103/PhysRevLett.56.185

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Partially gapped Fermi surface in the heavy-electron superconductor URu2Si2

M. B. Maple, J. W. Chen, Y. Dalichaouch, T. Kohara, C. Rossel, M. S. Torikachvili, M. W. McElfresh, J. D. Thompson

DOI 10.1103/PhysRevLett.56.185 · Physical Review Letters

T1

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Abstract

Transport, thermal, and magnetic data for the heavy electron system URu2Si2 indicate that a charge- or spin-density-wave transition opens an energy gap of ∼11 meV over a portion of the Fermi surface below T0≊17.5 K and demonstrate that bulk superconductivity occurs below Tc≊1.5 K. The pressure dependences of T0 and Tc support this interpretation. The unusually large initial slope of the upper critical magnetic field (9.2 T/K) is consistent with the high values of the electronic-specific-heat coefficient and the electrical resistivity.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.5	Pressure unresolved	midpoint
URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.5	Pressure unresolved	onset