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

Takashi Mizokawa; Takaaki Sudayama; Yuki Wakisaka

doi:10.1143/JPSJS.77SC.158

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 journal › Article › peer-review

15 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 language	English
Pages (from-to)	158-159
Number of pages	2
Journal	journal of the physical society of japan
Volume	77
Issue number	SUPPL. C
DOIs	https://doi.org/10.1143/JPSJS.77SC.158
Publication status	Published - 2008
Externally published	Yes

Keywords

Excitonic instability
LaFeAsO
Orbital degeneracy

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJS.77SC.158

Cite this

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title = "Electronic structure of LaFeAsO: yz/zx orbital degeneracy and excitonic instability",

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.",

keywords = "Excitonic instability, LaFeAsO, Orbital degeneracy",

author = "Takashi Mizokawa and Takaaki Sudayama and Yuki Wakisaka",

year = "2008",

doi = "10.1143/JPSJS.77SC.158",

language = "English",

volume = "77",

pages = "158--159",

journal = "Journal of the Physical Society of Japan",

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publisher = "Physical Society of Japan",

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TY - JOUR

T1 - Electronic structure of LaFeAsO

T2 - yz/zx orbital degeneracy and excitonic instability

AU - Mizokawa, Takashi

AU - Sudayama, Takaaki

AU - Wakisaka, Yuki

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - Excitonic instability

KW - LaFeAsO

KW - Orbital degeneracy

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EP - 159

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - SUPPL. C

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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