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Inelastic neutron scattering study of the resonance mode in the optimally doped pnictide superconductor LaFeAsO$$_{0.92}$$F$$_{0.08}$$

最適ドープされた超伝導体LaFeAsO$$_{0.92}$$F$$_{0.08}$$の共鳴モードに関する非弾性中性子散乱研究

社本 真一  ; 石角 元志; Christianson, A. D.*; Lumsden, M. D.*; 脇本 秀一  ; 樹神 克明   ; 伊豫 彰*; 新井 正敏

Shamoto, Shinichi; Ishikado, Motoyuki; Christianson, A. D.*; Lumsden, M. D.*; Wakimoto, Shuichi; Kodama, Katsuaki; Iyo, Akira*; Arai, Masatoshi

最適ドープされたT$$_{c}$$=29Kの超伝導体LaFeAsO$$_{0.92}$$F$$_{0.08}$$粉末試料の低エネルギースピン励起を非弾性中性子散乱で調べた。その結果、T$$_{c}$$以下のQ=1.15$$AA $$$$^{-1}$$で磁気散乱強度が増大し、共鳴モードとしてE$$_{res}$$=13meVでピークを示した。

An optimally doped iron-based superconductor LaFeAsO$$_{0.92}$$F$$_{0.08}$$ with T$$_{c}$$=29 K has been studied by inelastic powder neutron scattering. The magnetic excitation at Q = 1.15 $$AA $$$$^{-1}$$ is enhanced below T$$_{c}$$, leading to a peak at E$$_{res}$$=13 meV as the resonance mode.

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パーセンタイル:81.45

分野:Materials Science, Multidisciplinary

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