One-Sign Order Parameter in Iron Based Superconductor

@article{Borisenko2012OneSignOP,
  title={One-Sign Order Parameter in Iron Based Superconductor},
  author={Sergey V. Borisenko and Volodymyr B. Zabolotnyy and Alexnader A. Kordyuk and Danil V. Evtushinsky and Timur K. Kim and Igor V. Morozov and Rolf Follath and Bernd B{\"u}chner},
  journal={Symmetry},
  year={2012},
  volume={4},
  pages={251-264}
}
The onset of superconductivity at the transition temperature is marked by the onset of order, which is characterized by an energy gap. Most models of the iron-based superconductors find a sign-changing (s±) order parameter [1–6], with the physical implication that pairing is driven by spin fluctuations. Recent work, however, has indicated that LiFeAs has a simple isotropic order parameter [7–9] and spin fluctuations are not necessary [7,10], contrary to the models [1–6]. The strength of the… CONTINUE READING
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