Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO

By Fengjie Ma, Zhong-yi Lu, Tao Xiang. 2008

167 citations recorded by the source corpus.

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.

Subfields: Accounting, Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/bc3686730c8a96eca5735836d339583158e15032

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Accounting

1. Zhi-xun Shen
2. G. Stewart

In Condensed Matter Physics

1. P. Dai
2. Xianhui Chen
3. D. Feng
4. Fu-Chun Zhang
5. Tao Xiang
6. Zhi-xun Shen
7. G. Stewart
8. E. Dagotto

In Electronic, Optical and Magnetic Materials

1. P. Dai
2. D. Feng
3. Fu-Chun Zhang
4. Xianhui Chen
5. Tao Xiang
6. Zhi-xun Shen
7. L. Degiorgi
8. Ian R. Fisher

Citations in the corpus

• Superconductivity in iron compounds (2011, background): “Several theoretical works (Ma, Lu, and Xiang, 2008, Si and Abrahams, 2008, Yildirim, 2008) in the 1111 materials argue for the importance of frustration.”
• Iron-based high transition temperature superconductors (2014, background): “Similar band structures are found for other iron pnictides [194,195] and chalcogenides [133].”
• In-plane electronic anisotropy of underdoped ‘122’ Fe-arsenide superconductors revealed by measurements of detwinned single crystals (2011, background): “From a theoretical perspective, it was quickly appreciated that spin fluctuations might play a key role in driving the nematic transition (Fang et al 2008, Ma et al 2008, Xu et al 2008, Mazin et al 2009).”