Fig. 1: Crystal structure, X-ray diffraction, Schematic of ARPES and RIXS results.
From: Spin excitations and flat electronic bands in a Cr-based kagome superconductor
A Unit cell of CsCr3Sb5. The Cr forms a kagome lattice. B, C Reciprocal space of CsCr3Sb5. CDW observed by XRD are shown as red arrows or red points. The green arrow marks the q of temperature-dependent RIXS, where q∥ is the projection of q onto the sample surface. D, F XRD in the (H, K, 0) plane at 110 K and 35 K. E, G Corresponding cuts of (F) and (G), respectively. H Cartoon illustration of the ARPES observed shift of the kagome flat band away from EF below TCDW. I Cartoon illustration of the observed shift of the magnetic excitations observed by RIXS across TCDW. The light orange and light blue shaded areas indicate the spectral weight that is coupled to particle-hole excitations across EF illustrated in (H).
