Critical point in the superconducting phase diagram of UPt3
K. Hasselbach, L. Taillefer, J. Flouquet
DOI 10.1103/PhysRevLett.63.93 · Physical Review Letters
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Abstract
We report on detailed measurements of the specific heat of UPt3, performed on a high-quality single crystal in a magnetic field perpendicular to the c axis, at temperatures down to 100 mK. Two distinct phase transitions at zero field are seen to converge at a critical point, near H=5 kOe, which coincides with the sharp break in the Hc2 curve. Beyond that point, there is evidence for only one phase. Combining these thermodynamic results with ultrasonic attenuation and Hc2 data, an H-T diagram is constructed which consists of a ‘‘polycritical’’ point and several superconducting phases.
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. | 0.49 | Pressure not reported | midpoint |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.503 | Pressure not reported | unknown |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.532 | Pressure not reported | unknown |
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