Dual character of magnetism in EuFe2As2: Optical spectroscopic and density-functional calculation study

S. J. Moon; J. H. Shin; D. Parker; W. S. Choi; I. I. Mazin; Y. S. Lee; J. Y. Kim; N. H. Sung; B. K. Cho; S. H. Khim; J. S. Kim; K. H. Kim; T. W. Noh

doi:10.1103/PhysRevB.81.205114

Dual character of magnetism in EuFe₂As₂: Optical spectroscopic and density-functional calculation study

S. J. Moon, J. H. Shin, D. Parker, W. S. Choi, I. I. Mazin, Y. S. Lee, J. Y. Kim, N. H. Sung, B. K. Cho, S. H. Khim, J. S. Kim, K. H. Kim, T. W. Noh

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

We investigate the electronic structure of EuFe₂As₂ using optical spectroscopy and density-functional calculations. At low temperature we observe the evolution of two gaplike features, one having a weak-coupling mean-field behavior and another with strongly nonmean-field behavior. Using band-structure calculations, we identify the former with a spin-Peierls-type partial gap in dyz bands and the latter with the transition across the large exchange gap in dxz / dxy bands. Our results demonstrate that the antiferromagnetism in the ferropnictides is neither fully local nor fully itinerant but contains elements of both.

Original language	English
Article number	205114
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevB.81.205114
State	Published - May 19 2010
Externally published	Yes

Access to Document

10.1103/PhysRevB.81.205114

Cite this

Moon, S. J., Shin, J. H., Parker, D., Choi, W. S., Mazin, I. I., Lee, Y. S., Kim, J. Y., Sung, N. H., Cho, B. K., Khim, S. H., Kim, J. S., Kim, K. H., & Noh, T. W. (2010). Dual character of magnetism in EuFe₂As₂: Optical spectroscopic and density-functional calculation study. Physical Review B - Condensed Matter and Materials Physics, 81(20), Article 205114. https://doi.org/10.1103/PhysRevB.81.205114

@article{aa1c982d90504865be6f2878b6548f1c,

title = "Dual character of magnetism in EuFe2As2: Optical spectroscopic and density-functional calculation study",

abstract = "We investigate the electronic structure of EuFe2As2 using optical spectroscopy and density-functional calculations. At low temperature we observe the evolution of two gaplike features, one having a weak-coupling mean-field behavior and another with strongly nonmean-field behavior. Using band-structure calculations, we identify the former with a spin-Peierls-type partial gap in dyz bands and the latter with the transition across the large exchange gap in dxz / dxy bands. Our results demonstrate that the antiferromagnetism in the ferropnictides is neither fully local nor fully itinerant but contains elements of both.",

author = "Moon, {S. J.} and Shin, {J. H.} and D. Parker and Choi, {W. S.} and Mazin, {I. I.} and Lee, {Y. S.} and Kim, {J. Y.} and Sung, {N. H.} and Cho, {B. K.} and Khim, {S. H.} and Kim, {J. S.} and Kim, {K. H.} and Noh, {T. W.}",

year = "2010",

month = may,

day = "19",

doi = "10.1103/PhysRevB.81.205114",

language = "English",

volume = "81",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "20",

}

TY - JOUR

T1 - Dual character of magnetism in EuFe2As2

T2 - Optical spectroscopic and density-functional calculation study

AU - Moon, S. J.

AU - Shin, J. H.

AU - Parker, D.

AU - Choi, W. S.

AU - Mazin, I. I.

AU - Lee, Y. S.

AU - Kim, J. Y.

AU - Sung, N. H.

AU - Cho, B. K.

AU - Khim, S. H.

AU - Kim, J. S.

AU - Kim, K. H.

AU - Noh, T. W.

PY - 2010/5/19

Y1 - 2010/5/19

N2 - We investigate the electronic structure of EuFe2As2 using optical spectroscopy and density-functional calculations. At low temperature we observe the evolution of two gaplike features, one having a weak-coupling mean-field behavior and another with strongly nonmean-field behavior. Using band-structure calculations, we identify the former with a spin-Peierls-type partial gap in dyz bands and the latter with the transition across the large exchange gap in dxz / dxy bands. Our results demonstrate that the antiferromagnetism in the ferropnictides is neither fully local nor fully itinerant but contains elements of both.

AB - We investigate the electronic structure of EuFe2As2 using optical spectroscopy and density-functional calculations. At low temperature we observe the evolution of two gaplike features, one having a weak-coupling mean-field behavior and another with strongly nonmean-field behavior. Using band-structure calculations, we identify the former with a spin-Peierls-type partial gap in dyz bands and the latter with the transition across the large exchange gap in dxz / dxy bands. Our results demonstrate that the antiferromagnetism in the ferropnictides is neither fully local nor fully itinerant but contains elements of both.

UR - http://www.scopus.com/inward/record.url?scp=77955759500&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.81.205114

DO - 10.1103/PhysRevB.81.205114

M3 - Article

AN - SCOPUS:77955759500

SN - 1098-0121

VL - 81

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 20

M1 - 205114

ER -

Dual character of magnetism in EuFe₂As₂: Optical spectroscopic and density-functional calculation study

Abstract

Access to Document

Other files and links

Fingerprint

Cite this