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题名: Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO
作者: Ma, Fengjie ;  Lu, Zhong-Yi ;  Xiang, Tao
刊名: PHYSICAL REVIEW B
出版日期: 2008
卷号: 78, 期号:22, 页码:-
关键词: SUPERCONDUCTIVITY ;  INSTABILITY
学科分类: Physics
通讯作者: Ma, F , Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
部门归属: [Ma, F; Xiang, T] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Ma, F; Lu, ZY] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China; [Xiang, T] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
英文摘要: From the first-principles calculations, we have studied the electronic and magnetic structures of LaFeAsO. It is found that a large magnetic moment of similar to 2.6 mu(B) is located around each Fe ion, embedded in the environment of itinerant electrons. In the ground state, these local Fe moments are in collinearly antiferromagnetic order, resulting from the interplay between the strong nearest- and next-nearest-neighbor superexchange antiferromagnetic interactions bridged by As atoms. The structure transition observed by the neutron scattering is shown to be magnetically driven. Our study suggests that the antiferromagnetic fluctuation plays an important role in Fe-based superconductors. This sheds light on the understanding of the pairing mechanism in these materials.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000262245200085
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5420
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ma, Fengjie,Lu, Zhong-Yi,Xiang, Tao. Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO[J]. PHYSICAL REVIEW B,2008,78(22):-.
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