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

Takashi Mizokawa, Takaaki Sudayama, Yuki Wakisaka

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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
Volume77
Issue numberSUPPL. C
Publication statusPublished - 2008
Externally publishedYes

Fingerprint

electronic structure
orbitals
Jahn-Teller effect
antiferromagnetism
electrons

Keywords

  • Excitonic instability
  • LaFeAsO
  • Orbital degeneracy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electronic structure of LaFeAsO : yz/zx orbital degeneracy and excitonic instability. / Mizokawa, Takashi; Sudayama, Takaaki; Wakisaka, Yuki.

In: Journal of the Physical Society of Japan, Vol. 77, No. SUPPL. C, 2008, p. 158-159.

Research output: Contribution to journalArticle

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