Figure 3: Spin excitations of the optimally hole-doped BKFA superconductor.
From: Persistent high-energy spin excitations in iron-pnictide superconductors
(a,b) RIXS spectra of BKFA along (0, 0)–(1, 0) and (0, 0)–(1, 1) directions obtained at 15 K with π polarized incoming light. The probed q// range is the same as in the parent BFA sample. (c) Spin excitations along (0, 0)–(1, 0) (upper panel) and (0, 0)–(1, 1) (lower panel) directions at 15 K after subtracting the background and quasi-elastic peak. The arrows mark the fitted peak centers. Spectra are vertically stacked according to different q// values.
