Coexistence of ferromagnetism and superconductivity

T. R. Kirkpatrick; D. Belitz

doi:10.1103/PhysRevB.67.024515

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Coexistence of ferromagnetism and superconductivity

T. R. Kirkpatrick, D. Belitz

DOI 10.1103/PhysRevB.67.024515 · Physical Review B

T1

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Abstract

A comprehensive theory is developed that describes the coexistence of p-wave, spin-triplet superconductivity, and itinerant ferromagnetism. It is shown how to use field-theoretic techniques to derive both conventional strong-coupling theory, and analogous gap equations for superconductivity induced by magnetic fluctuations. It is then shown and discussed in detail that the magnetic fluctuations are generically stronger on the ferromagnetic side of the magnetic phase boundary, which substantially enhances the superconducting critical temperature in the ferromagnetic phase over that in the paramagnetic one. The resulting phase diagram is compared with the experimental observations in UGe2 and ZrZn2.

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.	—	Pressure not reported	unknown
ZrZn2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	Pressure not reported	unknown
URhGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown