Unusual doping dependence of the electronic structure and coexistence of spin-density-wave and superconductor phases in single crystalline Sr1-xKxFe2As2.
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.
Zhang
Y
Y
Department of Physics, Surface Physics Laboratory, Fudan University, Shanghai 200433, People's Republic of China.
Wei
J
J
Ou
H W
HW
Zhao
J F
JF
Zhou
B
B
Chen
F
F
Xu
M
M
He
C
C
Wu
G
G
Chen
H
H
Arita
M
M
Shimada
K
K
Namatame
H
H
Taniguchi
M
M
Chen
X H
XH
Feng
D L
DL