Suppression of superconductivity by Néel-type magnetic fluctuations in the iron pnictides.

  title={Suppression of superconductivity by N{\'e}el-type magnetic fluctuations in the iron pnictides.},
  author={Rafael M. Fernandes and Andrew. J. Millis},
  journal={Physical review letters},
  volume={110 11},
Motivated by the recent experimental detection of Néel-type [(π, π)] magnetic fluctuations in some iron pnictides, we study the impact of competing (π, π) and (π, 0) spin fluctuations on the superconductivity of these materials. We show that, counterintuitively, even short-range, weak Néel fluctuations strongly suppress the s(+-) state, with the main effect arising from a repulsive contribution to the s(+-) pairing interaction, complemented by low-frequency inelastic scattering. Further… 

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