Pressure dependence of the superconducting phases in UPt3
T. Trappmann, H. v. Löhneysen, L. Taillefer
DOI 10.1103/PhysRevB.43.13714 · Physical Review B
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Abstract
We report measurements of the specific heat of the heavy-fermion compound UPt3 under hydrostatic pressure p up to 4.5 kbar. The two superconductive transitions at temperatures Tc+ and Tc− observed previously under zero pressure decrease at a rate of dTc+/dp=-24 mK/kbar and dTc−/dp=-5 mK/kbar. The transitions merge at p*=3.7 kbar and T*=419 mK. These results suggest that the weak antiferromagnetic order, which is suppressed on the same pressure scale, acts as a symmetry-breaking field in splitting the superconductive transition, thus yielding convincing evidence for a non-BCS order parameter for this system.
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. | 0.419 | 0.37 GPa | midpoint |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure unresolved | unknown |
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