Breakdown of the coexistence of spin-singlet superconductivity and itinerant ferromagnetism

R. Shen; Z. M. Zheng; S. Liu; D. Y. Xing

doi:10.1103/PhysRevB.67.024514

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Breakdown of the coexistence of spin-singlet superconductivity and itinerant ferromagnetism

R. Shen, Z. M. Zheng, S. Liu, D. Y. Xing

DOI 10.1103/PhysRevB.67.024514 · Physical Review B

T1

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Abstract

We discuss the possibility of coexistence of spin-singlet superconductivity and ferromagnetism in a model where the same electrons are assumed responsible for both of them. Our calculations include both zero- and finite-momentum pairing states with both s-wave and d-wave pairing symmetry. Under the mean-field approximation, the thermodynamic potential of the nonmagnetic superconducting state is shown to be always lower than that of the superconducting ferromagnetic (SF) state. It follows that the spin-singlet SF state is energetically unfavorable, and a spin-triplet SF state is more likely to survive in metals such as 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.	—	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