Localized and mixed valence state of Ce $4f$ in superconducting and ferromagnetic CeO${}_{1-x}$F${}_x$BiS${}_2$ revealed by x-ray absorption and photoemission spectroscopy

T. Sugimoto, D. Ootsuki, E. Paris +11

We have performed Ce $L_3$-edge x-ray absorption spectroscopy (XAS) and Ce $4d$-$4f$ resonant photoemission spectroscopy (PES) on single crystals of CeO${}_{1-x}$F${}_x$BiS${}_2$ for $x=…