Electronic structure, spin excitations, and orbital ordering in a three-orbital model for iron pnictides

Abstract

A three-orbital itinerant-electron model involving d_{xz}, d_{yz} and d_{xy} Fe 3d orbitals is proposed for iron pnictides towards understanding the (π,0) ordered magnetism and magnetic excitations in these materials. It is shown that this model at half filling yields a gapped (π,0) magnetic state with high degree of robustness and stability, and simultaneously reproduces several experimentally observed features such as the electronic structure, spin excitations, as well as the ferro orbital order between the d_{xz} and d_{yz} orbitals.

arXiv comment10 pages, 9 figures

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Cited by in corpus (3)

• Highly anisotropic quasiparticle interference patterns in the spin-density wave state of the iron pnictides
• Multi-orbital quantum antiferromagnetism in iron pnictides --- effective spin couplings and quantum corrections to sublattice magnetization
• Magneto-orbital coupling in iron pnictides