All-electrical switching of a topological non-collinear antiferromagnet at room temperature

Non-collinear antiferromagnetic Weyl semimetals, combining the advantages of a zero stray field and ultrafast spin dynamics, as well as a large anomalous Hall effect and the chiral anomaly of Weyl fermions, have attracted extensive interest. However, the all-electrical control of such systems at room temperature, a crucial step toward practical application, has not been reported. Here, using a small writing current density of around 5 × 10(6) A·cm(–2), we realize the all-electrical current-induced deterministic switching of the non-collinear antiferromagnet Mn(3)Sn, with a strong readout signal at room temperature in the Si/SiO(2)/Mn(3)Sn/AlO(x) structure, and without external magnetic field or injected spin current. Our simulations reveal that the switching originates from the current-induced intrinsic non-collinear spin-orbit torques in Mn(3)Sn itself. Our findings pave the way for the development of topological antiferromagnetic spintronics.