The Ba 0.6 K 0.4 Fe 2 As 2 superconducting four-gap temperature evolution: A multi-band Chebyshev–BdG approach

  title={The Ba 0.6 K 0.4 Fe 2 As 2 superconducting four-gap temperature evolution: A multi-band Chebyshev–BdG approach},
  author={David Moeckli and Evandro V.L. De Mello},
  journal={Physics Letters A},
Abstract We generalize the Chebyshev–Bogoliubov–deGennes method to treat multi-band systems to address the temperature dependence of the superconducting gaps of iron based superconductors. This approach is suitable to deal with large matrices required for multi-band systems and for the case when charge inhomogeneities are important. Four superconducting gaps associated with different electron and hole pockets of optimally doped Ba 0.6 K 0.4 Fe 2 As 2 were clearly identified by angle resolved… Expand

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