Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor
文献类型：期刊论文
| 作者 | Zeng, LK ; Wang, XB ; Ma, J ; Richard, P ; Nie, SM ; Weng, HM ; Wang, NL ; Wang, Z ; Qian, T ; Ding, H |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2014 |
| 卷号 | 90期号:5 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Zeng, LK (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We have performed an angle-resolved photoemission spectroscopy study of the BiS2-based superconductor Nd(O,F)BiS2. Two small electronlike Fermi surfaces around X(pi, 0) are observed, which enclose 2.4% and 1.1% of the Brillouin zone area, respectively, corresponding to an electron doping of 7% per Bi site. The Fermi surface topology is far from the nesting scenario proposed in most of the theoretical models for the BiS2-based superconductors. The conduction bands show significant anisotropic splitting along XM and Gamma X, which is attributed to the cooperative effects of large spin-orbit coupling and interlayer coupling. The low-energy spectrum exhibits a weakly dispersing broad hump near the bottom of the conduction bands. This hump is drastically suppressed with increasing temperature, while the spectral weight at the Fermi level is essentially unaffected. These anomalous spectral features indicate that the electrons could be strongly coupled with the lattice in the low-temperature normal state of this superconductor. |
| 资助信息 | CAS [2010Y1JB6, XDB07000000]; MOST [2010CB923000, 2011CBA001000, 2011CB921701, 2013CB921700, 2011CBA00108, 2012CB821403]; NSFC [11004232, 11050110422, 11274362, 11234014, 11120101003, 11074291, 11274359, 11104339]; DOE [DE-FG02-99ER45747, DE-SC0002554] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59516]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zeng, LK,Wang, XB,Ma, J,et al. Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor[J]. PHYSICAL REVIEW B,2014,90(5). |
| APA | Zeng, LK.,Wang, XB.,Ma, J.,Richard, P.,Nie, SM.,...&Ding, H.(2014).Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor.PHYSICAL REVIEW B,90(5). |
| MLA | Zeng, LK,et al."Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor".PHYSICAL REVIEW B 90.5(2014). |
入库方式： OAI收割
来源：物理研究所
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