Ferromagnetic superconductivity driven by changing Fermi surface topology

Abstract

We introduce a simple but powerful zero temperature Stoner model to explain the unusual phase diagram of the ferromagnetic superconductor, UGe2. Triplet superconductivity is driven in the ferromagnetic phase by tuning the majority spin Fermi level through one of two peaks in the paramagnetic density of states (DOS). Each peak is associated with a metamagnetic jump in magnetisation. The twin peak DOS may be derived from a tight-binding, quasi-one-dimensional bandstructure, inspired by previous bandstructure calculations.

9 pages, 9 figures, REVTeX 4. Version 2: updated references and corrected typos

References in corpus (7)

• Pressure dependence of the magnetization in the ferromagnetic superconductor UGe_2
• Magnetism, Spin-Orbit Coupling, and Superconducting Pairing in UGe${}_2$
• Theory of Ferromagnetic Superconductivity
• Quantum critical effects on transition temperature of magnetically mediated p-wave superconductivity
• Strong Enhancement of Superconducting T_c in Ferromagnetic Phases
• Effect of Ferromagnetic Spin Correlations on Superconductivity in Ferromagnetic Metals
• The Magnetic Phase Diagram and the Pressure and Field Dependence of the Fermi Surface in UGe${}_2$

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