  Using a pure electric current to control kagome noncollinear antiferromagnets
is promising in information storage and processing, but a full description is
still lacking, in particular, on intrinsic (i.e., no external magnetic fields
or external spin currents) spin-orbit torques. In this work, we
self-consistently describe the relations among the electronic structure,
magnetic structure, spin accumulations, and intrinsic spin-orbit torques, in
the magnetic dynamics of a noncollinear antiferromagnet driven by a pure
electric current. Our calculation can yield a critical current density
comparable with those in the experiments, when considering the boost from the
out-of-plane magnetic dynamics induced by the current-driven spin accumulation
on individual magnetic moments. We stress the parity symmetry breaking in
deterministic switching among magnetic structures. This work will be helpful
for future applications of noncollinear antiferromagnets.
