Fig. 4: Absence of 1 × 4 superlattice peak in the X-ray diffraction measurement of bulk CsV3Sb5.
From: Discovery of conjoined charge density waves in the kagome superconductor CsV3Sb5
a Topographic image of a clean Sb surface (V = −100 mV, I = 0.5 nA). b Fourier transform of the topography showing Bragg peaks and charge ordering vector peaks. The in-plane 2 × 2 CDW, 1 × 4 charge order and Bragg peaks are highlighted by circles. c, d On-resonance (Sb L1 edge, Fig. 2b) and under-resonance X-ray diffraction measurement around Q = (0.25, 0, 2.5) at T = 10 K. e Schematics indicating the scattering trajectories for scans shown in f. meV-resolution hard X-ray diffraction measurements shown in f were performed at 10 K and covered all in-plane high symmetry directions with zero and finite L components. The bulk CDW peaks can be clearly resolved in all scans in f, but there is no peak feature at q = 0.25 in neither the resonance measurements (c, d) nor the high-precision hard X-ray measurement (f).
