Highly Robust Reentrant Superconductivity in CsV₃Sb₅ under Pressure

We present the superconducting (SC) property and high-robustness of structural stability kagome CsV 3 Sb 5 under in situ high pressures. For initial SC-I phase, its T c is quickly enhanced from 3.5 K to 7.6 then totally suppressed at P ? 10 GPa. With further increasing pressure, an SC-II phase emerges 15 GPa persists up 100 The rapidly increases maximal value 5.2 = 53.6 slowly decreases 4.7 A two-dome-like variation concluded here. Raman measurements demonstrate that weakening E 2g mode strengthening 1g occur without transition which supported by results phonon spectra calculations. Electronic structure calculations reveal exertion pressure may bridge gap topological surface nontrivial states near F , i.e., disappearance Z 2 invariant. Meanwhile, Fermi enlarges significantly, consistent with increased carrier density. findings here suggest change electronic strengthened electron-phonon coupling should be responsible for pressure-induced reentrant SC.