Superconducting gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved photoemission spectroscopy

@inproceedings{Nakayama2009SuperconductingGS,
  title={Superconducting gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved photoemission spectroscopy},
  author={Kosuke Nakayama and Tsugumichi Sato and Patrick Richard and Yiming Xu and Yoichi Sekiba and Satofumi Souma and G.-f. Chen and Jianlin Luo and Ning Li Lu Wang and Huafeng Ding and Takanari Takahashi},
  year={2009}
}
We have performed high-resolution angle-resolved photoemission spectroscopy on the optimally doped Ba0.6K0.4Fe2As2 compound and determined the accurate momentum dependence of the superconducting (SC) gap in four Fermi-surface sheets including a newly discovered outer electron pocket at the M-point. The SC gap on this pocket is nearly isotropic and its magnitude is comparable (?~11?meV) to that of the inner electron and hole pockets (~12?meV), although it is substantially larger than that of the… CONTINUE READING

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