Tunneling spectroscopy of the superconducting state of URu2Si2

A. Maldonado; I. Guillamon; J. G. Rodrigo; H. Suderow; S. Vieira; D. Aoki; J. Flouquet

doi:10.1103/PhysRevB.85.214512

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Tunneling spectroscopy of the superconducting state of URu2Si2

A. Maldonado, I. Guillamon, J. G. Rodrigo, H. Suderow, S. Vieira, D. Aoki, J. Flouquet

DOI 10.1103/PhysRevB.85.214512 · Physical Review B

T1

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Abstract

We present measurements of the superconducting gap of URu2Si2 made with scanning tunneling microscopy using a superconducting tip of Al. We find tunneling conductance curves with a finite value at the Fermi level. The density of states is V shaped at low energies, and the quasiparticle peaks are located at values close to the expected superconducting gap from weak-coupling BCS theory. Our results point to rather opened gap structures and gap nodes on the Fermi surface.

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 not reported	onset