title: Unusual doping dependence of the electronic structure and coexistence of spin-density-wave and superconductor phases in single crystalline Sr1-xKxFe2As2.
abstract: The nature of the spin-density wave (SDW) and its relation with superconductivity are crucial issues in the newly discovered iron-pnictide superconductors. Particularly, it is unclear whether the superconducting phase and SDW are truly exclusive from each other. We here report splittings of the band structures in Sr1-xKxFe2As2 (x=0, 0.1, 0.18), and their unusual doping dependence. Our data on single crystalline samples prove that the SDW and superconductivity could coexist in iron pnictides.
authors.affiliation: Department of Physics, Surface Physics Laboratory, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Wei
authors.forename: H W
authors.initials: HW
authors.lastname: Ou
authors.forename: J F
authors.initials: JF
authors.lastname: Zhao
authors.forename: B
authors.initials: B
authors.lastname: Zhou
authors.forename: F
authors.initials: F
authors.lastname: Chen
authors.forename: M
authors.initials: M
authors.lastname: Xu
authors.forename: C
authors.initials: C
authors.lastname: He
authors.forename: G
authors.initials: G
authors.lastname: Wu
authors.forename: H
authors.initials: H
authors.lastname: Chen
authors.forename: M
authors.initials: M
authors.lastname: Arita
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authors.initials: K
authors.lastname: Shimada
authors.forename: H
authors.initials: H
authors.lastname: Namatame
authors.forename: M
authors.initials: M
authors.lastname: Taniguchi
authors.forename: X H
authors.initials: XH
authors.lastname: Chen
authors.forename: D L
authors.initials: DL
authors.lastname: Feng