Evolution of charge order in the hole-doped kagome superconductor KV3Sb5

We present a study on the hole-doped kagome metal KV₃Sb₅ using laboratory X-ray and magnetization measurements. Titanium atoms were substituted for vanadium at the kagome lattice sites in controlled amounts via a conventional flux-based single-crystal growth technique. Hole-doped polycrystalline samples of KV₃Sb₅ were synthesized by annealing uniformly ground stoichiometric mixtures of the reactants. We examine how superconductivity evolves in KV₃₋ₓTiₓSb₅ as the long-range charge density wave (CDW) order weakens due to increasing Ti substitution. Our data reveal multi-superconducting domes as a function of Ti concentration. The second superconducting dome emerges with the disappearance of the charge density wave state. Our work reveals the intricate interplay between unconventional superconductivity and charge-density-wave correlations with hole doping in the kagome sites of KV₃Sb₅.