Anisotropic Josephson Effects in Point Contacts between the Heavy Fermion Superconductor URu2Si2 and Nb
S. Wasser, A. Nowack, W. Schlabitz, A. Freimuth, O. E. Kvitnitskaya, A. A. Menovsky, C. Bruder
DOI 10.1103/PhysRevLett.81.898 · Physical Review Letters
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Abstract
Point contacts between the heavy-fermion superconductor URu2Si2 and Nb are studied. A finite dc Josephson current is found in contacts aligned parallel to the a- b directions of URu2Si2, whereas it is absent in contacts aligned along the c direction. We attribute this extreme anisotropy of the Josephson current to an unconventional superconducting order parameter in URu2Si2, with a symmetry leading to destructive interference for Josephson currents along the c direction.
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. | 1.3 | Pressure not reported | onset |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.2 | Pressure not reported | onset |
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