Extended Data Fig. 2: Additional skyrmion velocity measurements via the nonlinear topological Hall effect – device 1.
From: Dynamic transition and Galilean relativity of current-driven skyrmions
a, The change in the measured Hall resistivity, Δρyx(J) = ρyx(J) − ρyx(J→0), at 2.5 K measured as a function of the applied magnetic field \(B\) at different DC current densities, JDC, for device 1. The boundaries between the ground state magnetic phases are labelled by the grey dashed lines. The vertical solid grey lines highlight fields considered in later panels. b, The topological Hall resistivity \({\rho }_{{yx}}^{{\rm{THE}}}\) plotted as a function of JDC for selected \(B\) between 0.86 and 1.44 T. c, The calculated skyrmion velocity vSk plotted as a function of JDC for selected B between 0.86 and 1.44 T. The electron drift velocity, ve, is plotted as the dotted/dashed line, calculated from the measured charge carrier density. d-f, The same as a-c, but at 5.0 K.
