期刊
EPL
卷 99, 期 5, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1209/0295-5075/99/57006
关键词
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资金
- Texas Center for Superconductivity at the University of Houston
- Robert A. Welch Foundation [E-1146]
- National Nuclear Security Administration of the U.S. Department of Energy at LANL [DE-AC52-06NA25396]
- U.S. DOE Office of Basic Energy Sciences
- National Natural Science Foundation of China [11074043]
- State Key Programs of China [2009CB929204, 2012CB921604]
- Research Fund of Fudan University for the Excellent Ph.D. Candidates
The pairing symmetry is one of the major issues in the study of iron-based superconductors. We adopt a ten-orbital model by using the maximally localized Wannier functions based on the first-principles band structure calculations combined with the J(1)-J(2) model for KFe2As2, the phase diagram of pairing symmetries is constructed. We find that the pairing symmetry for KFe2As2 is a nodal (s(x)2(y)2 + s(x)2+ (y)2)-wave in the folded Brillouin zone with two iron atoms per unit cell. This pairing symmetry can explain the experiments observed nodes, and it also can be tested by future experiments. Copyright (c) EPLA, 2012
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