title: Electronic structure and unusual exchange splitting in the spin-density-wave state of the BaFe2As2 parent compound of iron-based superconductors.
abstract: The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic structure of a parent compound of the newly discovered iron-based superconductor, BaFe2As2, which provides a foundation for further studies. We show that the energy of the spin density wave in BaFe2As2 is mainly lowered through exotic exchange splitting of the band structure.
authors.affiliation: Surface Physics Laboratory (National key laboratory), Physics Department, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: L X
authors.initials: LX
authors.lastname: Yang
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: H W
authors.initials: HW
authors.lastname: Ou
authors.forename: J F
authors.initials: JF
authors.lastname: Zhao
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authors.initials: DW
authors.lastname: Shen
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authors.initials: B
authors.lastname: Zhou
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authors.initials: J
authors.lastname: Wei
authors.forename: F
authors.initials: F
authors.lastname: Chen
authors.forename: M
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authors.lastname: Xu
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authors.lastname: He
authors.forename: Y
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authors.lastname: Chen
authors.forename: Z D
authors.initials: ZD
authors.lastname: Wang
authors.forename: X F
authors.initials: XF
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Wu
authors.forename: G
authors.initials: G
authors.lastname: Wu
authors.forename: X H
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authors.lastname: Chen
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authors.lastname: Arita
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authors.lastname: Shimada
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authors.lastname: Taniguchi
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Lu
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authors.initials: T
authors.lastname: Xiang
authors.forename: D L
authors.initials: DL
authors.lastname: Feng