Fig. 2: Evolution of the Raman modes in CsV3Sb5 across the CDW transition.
From: Observation of anomalous amplitude modes in the kagome metal CsV3Sb5
a, b Temperature-dependent Raman intensity color plot for CsV3Sb5, measured in the LL and LR configurations. The normal phonon modes are labeled in black and the CDW-induced modes in white. The dashed lines mark TCDW. c, d Temperature-dependent spectra for the A2 and E3 modes. e–g Frequency, linewidth, and amplitude for the E2g and A1g main lattice phonons. The frequency and amplitude are compared to the corresponding values at 200 K. h Temperature dependence of the Raman mode frequencies. i Temperature dependence of the linewidth of the A2 and E3 modes. Error bars are standard deviations obtained from the least-squares fits to the phonon peaks.
