Trapping skyrmions in a hole

Capturing of a magnetic skyrmion with a hole.
Jan Müller and Achim Rosch

Phys. Rev. B 91, 054410 (2015)

Snapshot of a micromagnetic simulation of skyrmion driven by a current (D=0.3J/a, μB=0.09J/a2, vs=0.001aJex, and α=β=0.4) in the presence of a single vacancy: a missing spin (gray sphere). The trajectory of the skyrmion center is indicated by a red line.