Phase diagram of the unconventional superconductor UPt3 in the weak-crystal-field model
M. E. Zhitomirsky, Kazuo Ueda
DOI 10.1103/PhysRevB.53.6591 · Physical Review B
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Abstract
We study the phase diagram of the heavy fermion superconductor UPt3 within a phenomenological model with two nearly degenerate order parameters corresponding to the A1 and E1 irreducible representations. A weak effect on superconductivity from the crystal lattice is also assumed. This assumption on one side provides an explanation for the closeness of two critical temperatures. On the other side it yields parameters of the Ginzburg-Landau functional which lead to a single superconducting transition when the order of critical temperatures changes with pressure. The experimental H-T diagram with a tetracritical point is reconstructed in the AE model. Vortex lattices are found for two orientations of the field. Restrictions imposed on the theory of the UPt3 phase diagram by experiments at pressures above critical and in a tilted magnetic field are also discussed. © 1996 The American Physical Society.
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 not reported | onset |
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