Depth-dependent study of time-reversal symmetry-breaking in the kagome superconductor AV₃Sb₅.

ABSTRACT: The breaking of time-reversal symmetry (TRS) in the normal state of kagome superconductors AV₃Sb₅ stands out as a significant feature, but its tunability is unexplored. Using low-energy muon spin rotation and local field numerical analysis, we study TRS breaking as a function of depth in single crystals of RbV₃Sb₅ (with charge order) and Cs(V_0.86Ta_0.14)₃Sb₅ (without charge order). In the bulk of RbV₃Sb₅ (>33 nm from the surface), we observed an increase in the internal magnetic field width in the charge-ordered state. Near the surface (<33 nm), the muon spin relaxation rate is significantly enhanced and this effect commences at temperatures significantly higher than the onset of ch

SUBMITTER: Graham JN 

PROVIDER: S-EPMC11487124 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature