Uniaxial-stress anisotropy of the double superconducting transition in UPt3
D. S. Jin, S. A. Carter, B. Ellman, T. F. Rosenbaum, D. G. Hinks
DOI 10.1103/PhysRevLett.68.1597 · Physical Review Letters
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Abstract
We study the specific heat of single-crystal UPt3 for uniaxial stress 0≤S≤4 kbar. For S∥c^, the lower and upper superconducting transitions move towards each other in temperature and merge by S=2 kbar and T=485 mK. In the normal state, the Sommerfeld constant γ increases 12% by 2 kbar and then plateaus. By contrast, for S∥a^, γ decreases steadily and the onset Tc’s of the two superconducting transitions remain essentially unchanged, although the specific-heat peaks broaden markedly. Residual strain in the basal plane may account for some crystals of UPt3 showing only one broad superconducting transition.
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. | 0.545 | Pressure unresolved | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.485 | 0.2 GPa | midpoint |
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