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Charge excitations in PrFeAsOx (x=0.7, 1) as disclosed by resonant inelastic X-ray scattering at the Fe-K edge

PrFeAsOx (x=0.7, 1)単結晶における電荷励起についての研究

Jarrige, I.; 野村 拓司; 石井 賢司; 吉田 雅洋; 社本 真一  ; Gretarsson, H.*; Kim, Y.-J.*

Jarrige, I.; Nomura, Takuji; Ishii, Kenji; Yoshida, Masahiro; Shamoto, Shinichi; Gretarsson, H.*; Kim, Y.-J.*

I will present our RIXS results obtained at the Fe-K edge on the 1111 system PrFeAsOx (x=0.7,1) which constitute the first observation of a RIXS signal in an iron pnictide. For both compounds, the spectra consist of two main features, dd interband transitions around 1.5 eV and As 4p - Fe 3d charge transfer around 4 eV. A clear momentum dependence is observed for the 1.5-eV feature as the momentum q is varied across the Fe-As plane.

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