Resonant inelastic X-ray scattering in single-crystal superconducting PrFeAsO

PrFeAsO超伝導体の単結晶における共鳴非弾性X線散乱

Jarrige, I.; 石井 賢司; 福田 竜生  ; 吉田 雅洋; 池内 和彦*; 石角 元志; 社本 真一  

Jarrige, I.; Ishii, Kenji; Fukuda, Tatsuo; Yoshida, Masahiro; Ikeuchi, Kazuhiko*; Ishikado, Motoyuki; Shamoto, Shinichi

We have performed a resonant inelastic X-ray scattering (RIXS) measurement at the Fe K-edge in a single crystal of the underdoped superconductor PrFeAsO (Tc = 42 K). The dependence of the RIXS spectra upon the incident energy E1 is observed to be nearly featureless. In the E1 = 7124 and 7125 eV spectra, we discern a feature centered around 4 eV which undergoes a slight resonant enhancement. The energy of this feature is reminiscent of the metal-ligand charge transfer in the cuprates, therefore we are tempted to ascribe it to the charge transfer between Fe3d and As 4p.