Neutron scattering of iron-based superconductors

S. Shamoto, S. Wakimoto, K. Kodama, M. Ishikado, A. D. Christianson, M. D. Lumsden, R. Kajimoto, M. Nakamura, Y. Inamura, M. Arai, K. Kakurai, F. Esaka, A. Iyo, H. Kito, H. Eisaki

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Low-energy spin excitations have been studied on polycrystalline LaFeAsO1-xFx samples by inelastic neutron scattering. The Q-integrated dynamical spin susceptibility χ″(ω) of the superconducting samples is found to be comparable to that of the magnetically ordered parent sample. On the other hand, χ″(ω) almost vanishes at x = 0.158, where the superconducting transition temperature Tc is suppressed to 7 K. In addition, χ″(ω) in optimally doped LaFeAsO0.918F0.082 with Tc = 29 K exhibits a spin resonance mode. The peak energy, Eres, when scaled by kBTc is similar to the value of about 4.7 reported in other high-Tc iron-based superconductors. This result suggests that there is intimate relationship between the dynamical spin susceptibility and high-Tc superconductivity in iron-based superconductors, and is consistent with a nesting condition between Fermi surfaces at the Γ and M points.

原文English
頁(從 - 到)639-642
頁數4
期刊Physica C: Superconductivity and its applications
471
發行號21-22
DOIs
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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