Possible superconductivity in nearly antiferromagnetic itinerant fermion systems

M. T. Béal-Monod; C. Bourbonnais; V. J. Emery

doi:10.1103/PhysRevB.34.7716

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Possible superconductivity in nearly antiferromagnetic itinerant fermion systems

M. T. Béal-Monod, C. Bourbonnais, V. J. Emery

DOI 10.1103/PhysRevB.34.7716 · Physical Review B

T1

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Abstract

Strong spin fluctuations arising in itinerant fermion systems close to a magnetic instability may induce or inhibit superconductivity depending on the nesting wave vector q0 for which the instability occurs. If ‖q0‖ is small but finite, triplet pairing is favored and singlet pairing is suppressed as efficiently as in nearly ferromagnetic systems (q0=0). If ‖q0‖ is large, there is a repulsive contribution from backward scattering by which triplet as well as singlet pairings are strongly depressed. The cases of UPt3, CePb3, and some organic compounds are considered.

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	unknown
CePb3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.2	Pressure not reported	unknown