Strong Enhancement of Superconducting Tc in Ferromagnetic Phases

T. R. Kirkpatrick; D. Belitz; Thomas Vojta; R. Narayanan

doi:10.1103/PhysRevLett.87.127003

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Strong Enhancement of Superconducting Tc in Ferromagnetic Phases

T. R. Kirkpatrick, D. Belitz, Thomas Vojta, R. Narayanan

DOI 10.1103/PhysRevLett.87.127003 · Physical Review Letters

T1

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Abstract

It is shown that the critical temperature for spin-triplet, p-wave superconductivity mediated by spin fluctuations is generically much higher in a Heisenberg ferromagnetic phase than in a paramagnetic one, due to the coupling of the magnons to the longitudinal magnetic susceptibility. Together with the tendency of the low-temperature ferromagnetic transition in very clean Heisenberg magnets to be of first order, this qualitatively explains the phase diagram recently observed in UGe2.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UGe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.5	Pressure not reported	onset
ZrZn2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown