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题名: The electron pairing of KxFe2-ySe2
作者: Wang, F ;  Yang, F ;  Gao, MA ;  Lu, ZY ;  Xiang, T ;  Lee, DH
刊名: EPL
出版日期: 2011
卷号: 93, 期号:5, 页码:57003
关键词: RENORMALIZATION-GROUP ;  SUPERCONDUCTIVITY
学科分类: Physics
通讯作者: Wang, F (reprint author), MIT, Dept Phys, Cambridge, MA 02139 USA.
部门归属: [Wang, Fa] MIT, Dept Phys, Cambridge, MA 02139 USA; [Yang, Fan] Beijing Inst Technol, Dept Phys, Beijing 100081, Peoples R China; [Gao, Miao; Lu, Zhong-Yi] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China; [Xiang, Tao] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Xiang, Tao] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; [Lee, Dung-Hai] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA; [Lee, Dung-Hai] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA
英文摘要: We studied the pairing instabilities in KxFe2-ySe2 using a two-stage functional renormalization group (FRG) method. Our results suggest the leading and subleading pairing symmetries are nodeless d(x2-y2) and nodal extended s, respectively. In addition, despite having no Fermi surfaces we find the buried hole bands make important contributions to the final effective interaction. From the bandstructure, spin susceptibility and the FRG results we conclude that the low-energy effective interaction in KxFe2-ySe2 is well described by a J(1)-J(2) model with dominant nearest-neighbor antiferromagnetic interaction J(1) (at least as far as the superconducting pairing is concerned). In the end we briefly mention several obvious experiments to test whether the pairing symmetry is indeed d(x2-y2). Copyright (c) EPLA, 2011
资助者: DOE [DE-AC02-05CH11231]; NSFC [10704008]; National Natural Science Foundation of China; MOST, China
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000288322900015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14400
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Wang, F,Yang, F,Gao, MA,et al. The electron pairing of KxFe2-ySe2[J]. EPL,2011,93(5):57003.
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