Inelastic neutron scattering on iron-based superconductor BaFe 2(As,P)2

M. Ishikado, K. Kodama, R. Kajimoto, M. Nakamura, Y. Inamura, S. Wakimoto, A. Iyo, H. Eisaki, M. Arai, S. Shamoto

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)


Inelastic neutron scattering has been performed on powder sample of an iron-based superconductor BaFe2(As0.65P 0.35)2 with superconducting transition temperature (T c) = 30 K, whose superconducting (SC) order parameter is expected to have line node. In the normal state, constant-E scan of dynamical structure factor, S(Q, E), exhibits a peak structure centered at momentum transfer Q ∼ 1.20 -1, corresponding to antiferromagnetic wave vector. Below Tc, the redistribution of the magnetic spectral weight takes place, resulting in the formation of a peak at E ∼ 12 meV and a gap below 6 meV. The enhanced magnetic peak structure is ascribed to the spin resonance mode, evidencing sign change in the SC order parameter similar to other iron-based high-Tc superconductors. It suggests that fully-gapped s ± symmetry dominates in this superconductor, which gives rise to high-Tc (=30 K) despite the nodal symmetry.

頁(從 - 到)643-646
期刊Physica C: Superconductivity and its applications
出版狀態Published - 2011 11月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程


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