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篇目详细内容 |
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【篇名】 |
Pairing symmetry in layered BiS2 compounds driven by electron–electron correlation |
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【刊名】 |
Frontiers of Physics |
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【刊名缩写】 |
Front. Phys |
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【ISSN】 |
2095-0462 |
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【EISSN】 |
2095-0470 |
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【DOI】 |
10.1007/s11467-013-0407-8 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2014 |
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【卷期】 |
9
卷2期 |
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【页码】 |
194-199
页,共
6
页 |
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【作者】 |
Yi Liang;
Xianxin Wu;
Wei-;
Feng Tsai;
Jiangping Hu;
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【关键词】 |
BiS2-based superconductor; pairing symmetry; electron–electron correlation |
【摘要】 |
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We investigate the pairing symmetry of layered BiS2 compounds by assuming that electron-electron correlation is still important so that the pairing is rather short range. We find that the extended s-wave pairing symmetry always wins over d-wave when the pairing is confined between two short range sites up to next nearest neighbors. The pairing strength is peaked around the doping level x = 0.5, which is consistent with experimental observation. The extended s-wave pairing symmetry is very robust against spin–orbital coupling because it is mainly determined by the structure of Fermi surfaces. Moreover, the extended s-wave pairing can be distinguished from conventional s-wave pairing by measuring and comparing superconducting gaps of different Fermi surfaces. |
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