Striped antiferromagnetism and electronic structures of SrFeAsF and their implications

Details Striped antiferromagnetism and electronic structures of SrFeAsF and their implications Striped antiferromagnetism and electronic structures of SrFeAsF and their implications

2008-10-28

arxiv.org/abs/0810.5049v2

EuroPhys. Lett. 85, 67009 (2009)

Physics

Condensed Matter

Materials Science

5 pages with figures included

Scientific paper

10.1209/0295-5075/85/67009

We investigate structural, magnetic, and electronic properties of SrFeAsF as a new parent for superconductors using state-of-the-art density-functional theory method. Calculated results show that striped antiferromagnetic order is the magnetic ground state in the Fe layer and interlayer magnetic interaction is tiny. Calculated As and Sr positions are in agreement with experiment. There are only two uniaxially-dispersed bands near the Fermi level. The valent charge is mainly in the Fe and F layers, and the magnetic moment is confined to the Fe atoms. Inter-Fe-spin couplings is due to superexchange through As atoms. These are useful to understanding the SrFeAsF and should have helpful implications to doped samples.

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