Nonmagnetic impurity effects and neutron scattering spectrum in iron pnictides

S. Onari, H. Kontani

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We study the effect of local impurity and the neutron scattering spectrum based on the five-orbital model obtained by the first principle calculation for iron pnictides. We find that the interband impurity scattering is induced by the complex multiorbital structure. This fact means that the fully-gapped sign-reversing s-wave state, which is predicted by spin-fluctuation theories, is very fragile against impurities. The result suggests a reasonable possibility that the fully-gapped s-wave state without sign reversal (s++-wave) would be realized in dirty iron pnictides. We also find that broad peak structure observed in the neutron scattering measurements can be explained by the s++-wave state.

Original languageEnglish
Pages (from-to)1007-1009
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume470
Issue number20
DOIs
Publication statusPublished - Nov 1 2010

Keywords

  • Impurity effect
  • Iron-based pnictides
  • Multi-band Hubbard model
  • Unconventional superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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