Anisotropy of point-contact spectra in the heavy-fermion superconductor UPt3
G. Goll, H. v. Löhneysen, I. K. Yanson, L. Taillefer
DOI 10.1103/PhysRevLett.70.2008 · Physical Review Letters
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Abstract
the heavy-fermion superconductor UPt3 has been studied in the superconducting state down to 36 mK by point-contact spectroscopy. Distinct minima in the differential resistance dV/dI versus voltage V related to the energy gap are observed for current flow parallel to the crystallographic c axis, while for current flow within the basal plane such features were almost always absent. This difference, together with a comparison of the Blonder-Tinkham-Klapwijk theory, gives clear evidence for a strong gap anisotropy. This is further supported by the unusual temperature and magnetic-field dependence of the spectra.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.521 | Pressure not reported | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.46 | Pressure not reported | midpoint |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.506 | Pressure not reported | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.439 | Pressure not reported | midpoint |
| URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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