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Possible orbital ordering of FeTe$$_{0.5}$$Se$$_{0.5}$$ based on the incommensurate magnetic excitation

格子不整合な磁気励起でのFeTe$$_{0.5}$$Se$$_{0.5}$$の軌道秩序の可能性

社本 真一  ; 石角 元志*; 梶本 亮一  ; 樹神 克明   ; 中村 充孝   ; 稲村 泰弘  ; 新井 正敏*

Shamoto, Shinichi; Ishikado, Motoyuki*; Kajimoto, Ryoichi; Kodama, Katsuaki; Nakamura, Mitsutaka; Inamura, Yasuhiro; Arai, Masatoshi*

Temperature dependence of incommensurability on magnetic excitation peaks of FeTe$$_{0.5}$$Se$$_{0.5}$$ has been studied in detail by inelastic neutron scattering at 4SEASONS in J-PARC/MLF. The results show a clear transition of incommensurability delta at 60 K. It can be due to a phase transition such as ferro-orbital ordering or nematic ordering even in FeTe$$_{0.5}$$Se$$_{0.5}$$.

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