Identical effects of indirect and direct electron doping of superconducting BaFe 2 As 2 thin films

  title={Identical effects of indirect and direct electron doping of superconducting BaFe 2 As 2 thin films},
  author={Takayoshi Katase and Soshi Iimura and Hidenori Hiramatsu and Toshio Kamiya and Hideo Hosono},
  journal={Physical Review B},
Electron doping of a 122-type iron pnictide BaFe2As2 by substituting the Ba site with an aliovalent ion (indirect doping), which had been unsuccessful by conventional solid-state synthesis methods, was achieved by a non-equilibrium film growth process. The substitution with La was substantiated by a systematic shrinkage of the c-axis lattice parameter due to the smaller ionic radius of La3+ than that of Ba2+. A negative Hall coefficient indicated that the majority carriers were electrons, as is… Expand
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