Fig. 3: Temperature dependence of the diffuse scattering and IXS central peak.
From: Order-disorder charge density wave instability in the kagome metal (Cs,Rb)V3Sb5
a 90 K, b 100 K and c 150 K around the (3 0 0.5) cut. The sketch in c shows the reciprocal lattice vectors and the IXS scan direction through the CDW, as indicated in the red line. d Profile of the diffuse scattering at 120 K and its fitting to a sum of Bragg and Lorentzian profiles. e Temperature dependence of the IXS spectra at the (2.5 0.5 0.5) reciprocal lattice vector, highlighting the enhancement of the elastic line and drop of intensity of the low-energy phonon at 96 K. f Temperature dependence of the intensity of the DS signal, elastic central peak and optical phonon. Inset, temperature dependence of the generalized susceptibility. T* denotes the change of slope of the electronic susceptibility, ~105 K, presumably related to percolation of CDW domains. The error bars are the fit to uncertainty.
