A_1相p波超导体中的铁磁转变  

Ferromagnetic transition in A_1 phase p-wave superconductors

作　　者：菅晓玲[1] 顾强[1] 

机构地区：[1]北京科技大学物理系,北京100083

出　　处：《广西大学学报（自然科学版）》2010年第6期1036-1040,1045,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：教育部科学技术研究重点项目(109011);霍英东高校青年教师基金(101008)

摘　　要：讨论了A1相p波超导态与铁磁态共存时超导电性对铁磁性的影响,发现自旋三重态的库珀配对能够增强铁磁序参量。即使在磁性序参量非常微弱的情况下,铁磁转变的温度Tm也不会低于超导转变温度Tc。当Tm和Tc重合时,磁性转变呈现一级相变的特征。系统的比热在相变点处显示了跳跃性的变化。预期本文的理论模型可以用来描述铁磁超导体UGe2的性质。The effect of the A1 phase p-wave superconductivity on the ferromagnetism in their coexistent state has been studied.It was found that the ferromagnetism would be enhanced by the spin-triplet Cooper pairing in the coexistent state and the ferromagnetic transition temperature Tm would not fall below the superconductive transition temperature Tc even with the very weak ferromagnetism.The characteristic of a first-order transition was shown at Tm=Tc.The specific heat shows a jump at the transition point.This theoretical model may be applied to the investigation of properties of the superconducting ferromagnet UGe2.

关 键 词：自旋三重态 超导电性 铁磁性 

分 类 号：O48[理学—固体物理]