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  Zhang, P.; Richard, P.; Qian, T.; Shi, X.; Ma, J.; Zeng, L.-K.; Wang, X.-P.; Rienks, E.; Zhang, C.-L.; Dai, P.; You, Y.-Z.; Weng, Z.-Y.; Wu, X.-X.; Hu, J.P.; Ding, H.: Observation of Momentum-Confined In-Gap Impurity State in Ba_0.6K_0.4Fe₂As₂: Evidence for Antiphase s_± Pairing. Physical Review X 4 (2014), p. 031001/1-8

10.1103/PhysRevX.4.031001
Open Access Version