supported by the National Natural Science Foundation of China (11190021,U1330105,11174266);the "Strategic Priority Research Program (B)" of the Chinese Academy of Sciences (XDB04040100);the National Basic Research Program of China (2011CBA00101)
Since the discovery of high-temperature superconductivity(HTS) in iron-based compounds,a variety of systems with different spacer layers have been fabricated. Concurrently,considerable experimental and theoretical eff...