Extended Data Fig. 4: Pressure-dependent electronic structure and phonon spectra.
From: Emergent charge order in pressurized kagome superconductor CsV3Sb5
a–e, Pressure-dependent DFT calculation of electronic structures without CDW modulation. Both Fermi surface topology and van Hove singularities remain nearly unchanged below 3 GPa. f–j, Pressure-dependent DFT calculation of phonon spectra without CDW modulation. The pressure is the same as the electronic structures on each phonon spectrum. The imaginary frequency at M point disappears above 2 GPa, but the imaginary frequency at L point remains at 3 GPa and finally disappears at 5 GPa. This result suggests that the CDW transition is expected up to 3 GPa, which is inconsistent with the observation in the present NMR experiment.
