Effect of electron doping in AV₃Sb₅ kagome superconductor system

The kagome structure embodies a most promising playground for the realization of emergent phenomena. The recently discovered kagome metals of the family AV₃Sb₅ (A=K,Rb,Cs) have renewed an interest into the exciting dynamics of the kagome structure, for they exhibit electronic and structural instabilities like charge fractionalization, superconductivity, and charge density waves. Our particular focus is to understand the apparent competition between the latter two phenomena. Namely, we studied the effect of electron doping in powders and single crystal versions of our system and observed a suppression of the charge density wave transition temperature and superconducting transition temperature with small electron doping concentrations. These results, complementary with hole doping analysis of the system, lay the foundation for the exploration of the complex interplay between charge density wave and superconducting states in this material.