Thermomodulated Intrinsic Josephson Effect in Kagome CsV3Sb5

Superconducting chiral domains associated with a time-reversal symmetry-breaking order parameter have garnered significant attention in kagome systems. In this Letter, we demonstrate both the intrinsic direct-current and alternating-current Josephson effects in the nanoplates of the vanadium-based kagome material CsV₃Sb₅, as evidenced by Fraunhofer-like patterns and Shapiro steps. Moreover, both the Fraunhofer-like patterns and Shapiro steps are modulated by thermal cycling, suggesting that the Josephson effects arise from dynamic superconducting domains. These findings may provide new insights into chiral superconductivity in CsV₃Sb₅ and highlight the potential of these intrinsic Josephson junctions for applications in chiral superconductor-based quantum devices.