Anisotropy of Heat Conduction in the Heavy Fermion Superconductor UPt3
Benoit Lussier, Brett Ellman, Louis Taillefer
DOI 10.1103/PhysRevLett.73.3294 · Physical Review Letters
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Abstract
We report on the first measurement of the anisotropy of heat conduction in a heavy fermion superconductor, performed on a single crystal of UPt3 with a current parallel and perpendicular to the hexagonal axis. Beyond the temperature-independent anisotropy of the normal state, a clear additional anisotropy develops in the superconducting state. This direct measure of gap anisotropy places precise constraints on the possible states for the two zero-field phases. An axial gap is excluded for both, and a comparison with existing calculations favors a d-wave gap for the low-temperature phase.
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. | 0.5 | Pressure unresolved | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.44 | Pressure unresolved | midpoint |
| UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.9 | Pressure not reported | unknown |
| URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.2 | Pressure not reported | unknown |
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