Magnetism, Spin-Orbit Coupling, and Superconducting Pairing in UGe2

A. B. Shick; W. E. Pickett

doi:10.1103/PhysRevLett.86.300

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Magnetism, Spin-Orbit Coupling, and Superconducting Pairing in UGe2

A. B. Shick, W. E. Pickett

DOI 10.1103/PhysRevLett.86.300 · Physical Review Letters

T1

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Abstract

A consistent picture on the mean-field level of the magnetic properties and electronic structure of the superconducting itinerant ferromagnet UGe2 requires inclusion of correlation effects beyond the local density approximation (LDA). The “ LDA+U” approach reproduces both the magnitude of the observed moment and the magnetocrystalline anisotropy. The largest Fermi surface sheet is composed primarily of spin majority states with orbital projection mℓ=0, suggesting a much simpler picture of the pairing than is possible for general strong spin-orbit coupled materials. The quasi-two-dimensional geometry of the Fermi surface supports the likelihood of magnetically mediated p-wave triplet pairing.

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.	1	1 GPa	unknown