Magnetic frustration and iron-vacancy ordering in iron chalcogenide
文献类型：期刊论文
| 作者 | Fang, C ; Xu, B ; Dai, PC ; Xiang, T ; Hu, JP |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 85期号:13 |
| 关键词 | EXCHANGE INTERACTIONS SPIN-WAVES SUPERCONDUCTIVITY |
| ISSN号 | 1098-0121 |
| 通讯作者 | Fang, C: Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. |
| 中文摘要 | We study the spin-and vacancy-ordered states in 122 iron chalcogenides (A(1-y)Fe(2-x)Se(2)) by inspecting the magnetic ground states of a J(1)-J(2)-J(3) model on different vacancy-ordered lattices observed/conjectured in these compounds. A highly frustrated J(1)-J(2)-J(3) model was first applied to the study of magnetism in FeTe and was reported to explain the inelastic neutron-scattering data qualitatively. We find that the vacancy-ordered states are generally energetically favored for their reduction of magnetic frustration inherent to the spin-exchange model and, especially, that the 245 vacancy-spin-ordered state minimizes the magnetic exchange energy among all known vacancy-ordered states, in line with the fact that it has the highest vacancy-ordering phase transition temperature and the largest ordered moment in all iron-based superconductors. Thus, our study provides an electronic perspective for understanding the various vacancy orderings in these compounds. Then we focus on the experimentally well-studied 245 state and calculate the spin-wave spectrum and dynamic spin susceptibility. Finding that the key features of these calculated quantities are consistent with a recent inelastic neutron-scattering experiment, we conclude that we have obtained a qualitative local spin model for the 245 state. We also discuss the possibility of a unified local-moment description for all iron chalcogenides based on our result. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41231]  |
| 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 | Fang, C,Xu, B,Dai, PC,et al. Magnetic frustration and iron-vacancy ordering in iron chalcogenide[J]. PHYSICAL REVIEW B,2012,85(13). |
| APA | Fang, C,Xu, B,Dai, PC,Xiang, T,&Hu, JP.(2012).Magnetic frustration and iron-vacancy ordering in iron chalcogenide.PHYSICAL REVIEW B,85(13). |
| MLA | Fang, C,et al."Magnetic frustration and iron-vacancy ordering in iron chalcogenide".PHYSICAL REVIEW B 85.13(2012). |
入库方式： OAI收割
来源：物理研究所
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