Аннотация:The authors demonstrate experimentally the existence of theoretically predicted antiferromagnetic Dirac states in the kagome compound FeSn, where the $P$ and $T$ symmetries are individually broken but the combined $P\phantom{\rule{0}{0ex}}T$ symmetry is present. Moreover, their theoretical analysis reveals that, due to the salient antiferromagnetic structure, the Dirac fermions can be transformed into either massless/massive Weyl or massive Dirac fermions via symmetry manipulation, and the study does report the experimental observation of Weyl-like cones at the surface driven by $P\phantom{\rule{0}{0ex}}T$ symmetry breaking that is induced by the Stark effect.
