Iron-based layered compound LaFeAsO is an antiferromagnetic semimetal

By Fengjie Ma, Zhong-yi Lu. 2008

160 citations recorded by the source corpus.

LaFeAsO is a parent compound of iron-based F-doped superconductors. An understanding of its ground phase and electronic structure is a precondition to understanding the underlying superconductivity mechanism. Our study shows that LaFeAsO is a quasi-two-dimensional antiferromagnetic semimetal with most carriers being electrons and with a magnetic moment of 2.3 mu(B) located around each Fe atom on the Fe-Fe square lattice. Physically, this is a commensurate antiferromagnetic spin-density wave due to the Fermi-surface nesting. The observed superconduction after the F doping happens on the Fe-Fe layer suggesting a new superconductivity mechanism mediated by spin fluctuations.

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

View Paper: https://www.semanticscholar.org/paper/d6a54d46b5c1763849daeb51ebdfacf2e52c8ab9

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In Condensed Matter Physics

1. P. Dai
2. Tao Xiang
3. D. Feng
4. Fu-Chun Zhang
5. Xianhui Chen

In Electronic, Optical and Magnetic Materials

1. P. Dai
2. Tao Xiang
3. D. Feng
4. Fu-Chun Zhang
5. Xianhui Chen

Citations in the corpus

• Iron-based high transition temperature superconductors (2014, background): “The electronic structure of the iron-based superconductors and related materials is characterized by the multi-band and multi-orbital nature [107].”