Doping dependence of the anisotropic quasiparticle interference in NaFe(1-x)Co(x)As iron-based superconductors.

@article{Cai2014DopingDO,
  title={Doping dependence of the anisotropic quasiparticle interference in NaFe(1-x)Co(x)As iron-based superconductors.},
  author={Peng Cai and Wei Ruan and Xiaodong Zhou and Cun Ye and Aifeng Wang and Xianhui Chen and Dunghai Lee and Yayu Wang},
  journal={Physical review letters},
  year={2014},
  volume={112 12},
  pages={
          127001
        }
}
We use scanning tunneling microscopy to investigate the doping dependence of quasiparticle interference (QPI) in NaFe1-xCoxAs iron-based superconductors. The goal is to study the relation between nematic fluctuations and Cooper pairing. In the parent and underdoped compounds, where fourfold rotational symmetry is broken macroscopically, the QPI patterns reveal strong rotational anisotropy. At optimal doping, however, the QPI patterns are always fourfold symmetric. We argue this implies small… Expand
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