Surface resistance of the heavy-fermion superconductor UPt3
C. C. Grimes, G. Adams, E. Bucher
DOI 10.1103/PhysRevB.44.4631 · Physical Review B
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Abstract
The surface resistance R of two UPt3 single crystals has been measured using an apparatus in which the direction of the rf or microwave current can be varied continuously relative to the crystal axes. In an a-axis single crystal at 0.38 K, R is found to be lower for current in the basal plane than for current along the c axis, while R is independent of current direction in a c-axis crystal. This suggests that the superconducting-energy-gap function is anisotropic with, on average, a larger gap in basal-plane directions than in the c-axis direction. R at 0.38 K is found to increase anomalously rapidly with increasing frequency to nearly the normal-state value at frequencies that are only a few percent of kTc.
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. | 0.525 | Pressure not reported | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | Pressure not reported | onset |
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