Fig. 2: Skyrmion annihilation with a notch.
From: Electrical manipulation of skyrmions in a chiral magnet
a A skyrmion cluster is pushed towards the notch using current pulses and absorbed by the notch gradually. The snapshots were taken under the defocus of 1 mm. The external field B = 70 mT, the pulse width is 20 ns and current density is \(4.06\times {10}^{10}\,{{{{{{\rm{A}}}}}}\cdot {{{{{\rm{m}}}}}}}^{-2}\). b The number of skyrmions \({N}_{s}\) decreases as the current pulses are applied to the system. c The average number of erased skyrmion per pulse as a function of current density.
