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The quest for topological states in strongly correlated materials ischallenging but essential from fundamental research and applicationperspectives. The magnetic Weyl semimetal (WSM) state in the chiralantiferromagnet Mn$_3$Sn emerges with strong electronic correlations, offeringan intriguing arena for exploring the interplay between Weyl fermions andcorrelation physics. One prominent characteristic of the WSM state is thechiral anomaly, yet the potential effects of electronic correlations on thechiral anomaly remain unexplored. Here, we report a comprehensive study of thein-plane magnetotransport properties of single-crystal Mn$_{3+x}$Sn$_{1-x}$with three different Mn doping levels ($x=0.053$, 0.070, and 0.090). The excessMn leads to glassy ferromagnetic behavior and the Kondo effect, aside fromshifting the chemical potential relative to the Weyl nodes. Thus, systematictuning of the Mn doping level enables us to study the interplay between thespin-fluctuation scatterings, the correlation effect, and the chiral anomaly.We identify negative longitudinal magnetoresistance and planar Hall effectspecific to the chiral anomaly for all three doping levels, indicating that thechiral anomaly persists in the presence of strong correlations.

Chiral-anomaly-driven magnetotransport in the correlated Weyl magnet Mn$_3$Sn