Dual character of magnetism in EuFe2As2: Optical spectroscopic and density-functional calculation study
SCIE
SCOPUS
- Title
- Dual character of magnetism in EuFe2As2: Optical spectroscopic and density-functional calculation study
- Authors
- Moon, SJ; Shin, JH; Parker, D; Choi, WS; Mazin, II; Lee, YS; Kim, JY; Sung, NH; Cho, BK; Khim, SH; Kim, JS; Kim, KH; Noh, TW
- Date Issued
- 2010-05-15
- Publisher
- AMER PHYSICAL SOC
- 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 d(yz) bands and the latter with the transition across the large exchange gap in d(xz)/d(xy) bands. Our results demonstrate that the antiferromagnetism in the ferropnictides is neither fully local nor fully itinerant but contains elements of both.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12224
- DOI
- 10.1103/PHYSREVB.81.205114
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 81, no. 20, 2010-05-15
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