Fermiology, orbital order, orbital fluctuations, and Cooper pairing in iron-based superconductors

被引：50
|
作者：
Yang, Fan [1 ]
Wang, Fa [2 ,3 ]
Lee, Dung-Hai [4 ,5 ]
机构：
[1] Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China
[2] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
[3] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
[4] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
来源：
PHYSICAL REVIEW B | 2013年 / 88卷 / 10期
关键词：
ANISOTROPY; SYMMETRY;
D O I：
10.1103/PhysRevB.88.100504
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We address two important issues that arise in recent studies of iron-based superconductivity. (1) Why are the T-c of A(x)Fe(2-y)Se(2) (A = K, Rb, Cs) and the single unit cell FeSe on SrTiO3 so high despite both only having electron pockets? (2) What (if any) are the effects of orbital order and orbital fluctuation on the Cooper pairing. Our main conclusions are the following: (1) removing hole pockets releases frustration of Cooper pairing from their band vorticity, therefore can enhance T-c, and (2) orbital fluctuation has negligible effect on Cooper pairing.
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页数：5
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