In-plane uniaxial-strain tuning of superconductivity and charge-density wave in CsV₃Sb₅

The kagome superconductor CsV₃Sb₅ with exotic electronic properties has attracted substantial research interest, and the interplay between the superconductivity and the charge-density wave is crucial for understanding its unusual electronic ground state. In this work, we performed resistivity and AC magnetic susceptibility measurements on CsV₃Sb₅ single crystals uniaxially-strained along 100 and 110 directions. We find that the uniaxial-strain tuning effect of T_c (dT_c/dε) and T_CDW (dT_CDW/dε) are almost identical along these distinct high-symmetry directions. These findings suggest the in-plane uniaxial-strain-tuning of T_c and T_CDW in CsV₃Sb₅ are dominated by associated c-axis strain, whereas the response to purely in-plane strains is likely small.