Fig. 3: Investigation of charge order in Fe4.75GeTe2by REXS and XRD.
From: Magnetic excitations and absence of charge order in the van der Waals ferromagnet Fe4.75GeTe2
a A sketch highlighting the measured symmetry equivalent Q positions. b H, K, and L scans of a representative (1/3 1/3 7.5) peak using 2.1 keV X-ray energy at 150 K. c The temperature dependence of the (1/3 1/3 7.5) peak. d Fixed-energy Q-scan of (1/3 1/3 L) (green dotted line), (2/3 −1/3 L) (pink dotted line), and of (0 0 L) (gray line) along the L direction. The temperature was set to 7 K for this measurement and the X-ray energy was tuned prior to the Fe K-edge, ~7.1 keV. Double peaks in (0 0 L) scan are due to a second crystallite. (0 0 L) scan is rescaled to match y-scale. e Absolute intensity comparison between (1/3 1/3 22.5) and (0 0 9) peaks. f Fixed-Q energy scan of (1/3 1/3 22.5) (green dotted line) and (0 0 9) (gray dotted line) peaks, rescaled to match y-scale. The Fe K-edge XAS of Fe4.75GeTe2measured in total fluoresce yield (TFY) mode is displayed (rescaled) for reference (blue dotted line).
