Electronic structure of LaFeAsO: yz/zx orbital degeneracy and excitonic instability

Takashi Mizokawa*, Takaaki Sudayama, Yuki Wakisaka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


We have studied the electronic structure of the FeAs layer in LaFeAsO using unrestricted Hartree-Fock calculations on a multi-orbital d-p Hamiltonian. Based on the calculated results, we argue that the antiferromagnetism of LaFeAsO is derived from the excitonic effect between the hole pocket at the Γ point and the electron pocket at the M point that is coupled with the band Jahn-Teller effect due to the yz/zx orbital degeneracy at the Γ point.

Original languageEnglish
Pages (from-to)158-159
Number of pages2
Journaljournal of the physical society of japan
Issue numberSUPPL. C
Publication statusPublished - 2008
Externally publishedYes


  • Excitonic instability
  • LaFeAsO
  • Orbital degeneracy

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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