Ferromagnetic superconductivity driven by changing Fermi surface topology

Preprint

24 October 2002

preprint
Published by arXiv in arXiv

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.

Keywords

FERROMAGNETIC SUPERCONDUCTIVITY
SUPERCONDUCTIVITY DRIVEN
DENSITY OF STATES
SURFACE TOPOLOGY
CHANGING FERMI
SUPERCONDUCTOR
BANDSTRUCTURE
FERMI

All Related Versions

Version 1, 2002-10-24, ArXiv
Version 2, 2002-10-29, ArXiv
Published version: Physical Review Letters, 90 (16), 167005.

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