Sandeman K G, Lonzarich G G, Schofield A J
Low Temperature Physics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom.
Phys Rev Lett. 2003 Apr 25;90(16):167005. doi: 10.1103/PhysRevLett.90.167005.
We introduce a simple but powerful zero temperature Stoner model to explain the unusual phase dia-gram 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 magnetization. The twin-peak DOS may be derived from a tight-binding, quasi-one-dimensional band structure, inspired by previous band-structure calculations.
我们引入一个简单却强大的零温度斯托纳模型来解释铁磁超导体UGe₂不同寻常的相图。通过调节顺磁态密度（DOS）中的两个峰之一来调整多数自旋费米能级，从而在铁磁相中驱动三重态超导。每个峰都与磁化强度的亚磁跃变相关。受先前能带结构计算的启发，双峰DOS可能源自一个紧束缚的准一维能带结构。
