期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 23, 期 13, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/23/13/135701
关键词
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资金
- Chinese Academy of Sciences
- Ministry of Science and Technology of China
- JSPS
- TRIP-JST
- CREST-JST
- MEXT of Japan
- NSF [DMR-0800641, DMR-0704545, DMR-0537588]
- DOE of the US [DEFG02-99ER45747]
- DOE [DE-AC02-05CH11231]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [704545] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [800641] Funding Source: National Science Foundation
The electronic structure of the Fe-based superconductor Ba0.6K0.4Fe2As2 is studied by means of angle-resolved photoemission. We identify dispersive bands crossing the Fermi level forming hole-like (electron-like) Fermi surfaces (FSs) around Gamma(M) with nearly nested FS pockets connected by the antiferromagnetic wavevector. Compared to band structure calculation findings, the overall bandwidth is reduced by a factor of 2 and the low energy dispersions display even stronger mass renormalization. Using an effective tight banding model, we fitted the band structure and the FSs to obtain band parameters reliable for theoretical modeling and calculation of physical quantities.
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