Thermomodulated intrinsic Josephson effect in Kagome CsV3Sb5

TL;DR

This study demonstrates intrinsic Josephson effects in CsV3Sb5 nanoplates, modulated by thermal cycling, revealing dynamic superconducting domains and offering insights into chiral superconductivity in Kagome materials.

Contribution

It provides the first evidence of intrinsic Josephson effects in CsV3Sb5 and shows their modulation by thermal cycling, indicating dynamic superconducting domains.

Findings

Intrinsic Josephson effects observed in CsV3Sb5 nanoplates.

Fraunhofer-like patterns and Shapiro steps modulated by thermal cycling.

Implications for chiral superconductor-based quantum devices.

Abstract

Superconducting chiral domains associated with a time-reversal symmetry-breaking order parameter have garnered significant attention in Kagome systems. In this work, 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.