Temperature-dependent striped antiferromagnetism of lafeaso in a green's function approach
文献类型：期刊论文
| 作者 | Liu, Gui-Bin1; Liu, Bang-Gui |
| 刊名 | Journal of physics-condensed matter
 |
| 出版日期 | 2009-05-13 |
| 卷号 | 21期号:19页码:6 |
| ISSN号 | 0953-8984 |
| DOI | 10.1088/0953-8984/21/19/195701 |
| 通讯作者 | Liu, gui-bin(gbliu@aphy.iphy.ac.cn) |
| 英文摘要 | We use a green's function method to study the temperature-dependent average moment and magnetic phase-transition temperature of the striped antiferromagnetism of lafeaso, and other similar compounds, as the parents of feas-based superconductors. we consider the nearest and the next-nearest couplings in the feas layer, and the nearest coupling for inter-layer spin interaction. the dependence of the transition temperature t(n) and the zero-temperature average spin on the interaction constants is investigated. we obtain an analytical expression for t(n) and determine our temperature-dependent average spin from zero temperature to t(n) in terms of unified self-consistent equations. for lafeaso, we obtain a reasonable estimation of the coupling interactions with the experimental transition temperature t(n) = 138 k. our results also show that a non-zero antiferromagnetic (afm) inter-layer coupling is essential for the existence of a non-zero t(n), and the many-body afm fluctuations reduce substantially the low-temperature magnetic moment per fe towards the experimental value. our green's function approach can be used for other feas-based parent compounds and these results should be useful to understand the physical properties of feas-based superconductors. |
| WOS关键词 | SUPERCONDUCTIVITY ; FERROMAGNETISM ; MODELS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000265418400025 |
| 出版者 | IOP PUBLISHING LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373703 |
| 专题 | 物理研究所 |
| 通讯作者 | Liu, Gui-Bin |
| 作者单位 | 1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 2.Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Gui-Bin,Liu, Bang-Gui. Temperature-dependent striped antiferromagnetism of lafeaso in a green's function approach[J]. Journal of physics-condensed matter,2009,21(19):6. |
| APA | Liu, Gui-Bin,&Liu, Bang-Gui.(2009).Temperature-dependent striped antiferromagnetism of lafeaso in a green's function approach.Journal of physics-condensed matter,21(19),6. |
| MLA | Liu, Gui-Bin,et al."Temperature-dependent striped antiferromagnetism of lafeaso in a green's function approach".Journal of physics-condensed matter 21.19(2009):6. |
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来源：物理研究所
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