The study investigates spin transfer torques in the skyrmion lattice of MnSi at ultra-low current densities. Using neutron scattering, the researchers observed a rotation of the diffraction pattern in response to currents that are five orders of magnitude smaller than those typically used in nanostructure studies. This effect is attributed to the efficient coupling of inhomogeneous spin currents to topologically stable knots in the spin structure. The skyrmion lattice, a new form of magnetic order, is characterized by a hexagonal lattice of magnetic vortex lines oriented parallel to the magnetic field. The rotation of the diffraction pattern is explained by the interplay of spin transfer torques, pinning forces, and anisotropy terms. The critical current density for rotation is estimated to be around \(10^6 \, \text{A m}^{-2}\), significantly lower than the current densities required for spin torque effects in ferromagnetic metals and semiconductors. The findings highlight the potential of chiral magnets and systems with nontrivial topological properties for advancing the understanding of spin torque effects.The study investigates spin transfer torques in the skyrmion lattice of MnSi at ultra-low current densities. Using neutron scattering, the researchers observed a rotation of the diffraction pattern in response to currents that are five orders of magnitude smaller than those typically used in nanostructure studies. This effect is attributed to the efficient coupling of inhomogeneous spin currents to topologically stable knots in the spin structure. The skyrmion lattice, a new form of magnetic order, is characterized by a hexagonal lattice of magnetic vortex lines oriented parallel to the magnetic field. The rotation of the diffraction pattern is explained by the interplay of spin transfer torques, pinning forces, and anisotropy terms. The critical current density for rotation is estimated to be around \(10^6 \, \text{A m}^{-2}\), significantly lower than the current densities required for spin torque effects in ferromagnetic metals and semiconductors. The findings highlight the potential of chiral magnets and systems with nontrivial topological properties for advancing the understanding of spin torque effects.