| Coexistence of itinerant electrons and local moments in iron-based superconductors | |
| Kou, Su-Peng ; Li, Tao ; Weng, Zheng-Yu | |
| 2010-10-12 ; 2010-10-12 ; OCT | |
| 关键词 | ORDER FEAS Physics, Multidisciplinary |
| 中文摘要 | In view of the recent experimental facts in the iron-pnictides, we make a proposal that the itinerant electrons and local moments are simultaneously present in such multiband materials. We study a minimal model composed of coupled itinerant electrons and local moments to illustrate how a consistent explanation of the experimental measurements can be obtained in the leading-order approximation. In this mean-field approach, the spin-density-wave (SDW) order and superconducting pairing of the itinerant electrons are not directly driven by the Fermi surface nesting, but are mainly induced by their coupling to the local moments with momentum match. The presence of the local moments as independent degrees of freedom naturally provides strong pairing strength for superconductivity and also explains the normal-state linear-temperature magnetic susceptibility above the SDW transition temperature. We show that this simple model is supported by various anomalous magnetic properties which are in quantitative agreement with experiments. Copyright (C) EPLA, 2009 |
| 语种 | 英语 ; 英语 |
| 出版者 | EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY ; MULHOUSE ; 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/81464]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Kou, Su-Peng,Li, Tao,Weng, Zheng-Yu. Coexistence of itinerant electrons and local moments in iron-based superconductors[J],2010, 2010, OCT. |
| APA | Kou, Su-Peng,Li, Tao,&Weng, Zheng-Yu.(2010).Coexistence of itinerant electrons and local moments in iron-based superconductors.. |
| MLA | Kou, Su-Peng,et al."Coexistence of itinerant electrons and local moments in iron-based superconductors".(2010). |
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