Signatures of pairing and spin-orbit coupling in correlation functions of Fermi gases

被引:8
|
作者
Wu, Chien-Te [1 ]
Anderson, Brandon M. [1 ]
Boyack, Rufus [1 ]
Levin, K. [1 ]
机构
[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
来源
PHYSICAL REVIEW B | 2015年 / 91卷 / 22期
关键词
D O I
10.1103/PhysRevB.91.220504
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We derive expressions for density-density and spin-spin correlation functions in the (greatly enhanced) pseudogap phase of spin-orbit-coupled Fermi gases. Density-density correlation functions are found to be relatively insensitive to the presence of these Rashba spin-orbit effects. To arrive at spin-spin correlation functions we derive new f-sum rules, valid even in the absence of a spin conservation law. Our spin-spin correlation functions are shown to be fully consistent with these f-sum rules. Importantly, they provide a clear signature of the Rashba band structure and separately help to establish the presence of a pseudogap.
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页数:5
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