Generating skyrmions by injection of spin current

Skyrmion generation by current.
Youngbin Tchoe and Jung Hoon Han
Phys. Rev. B 85, 174416 (2012)

Skyrmion generation by circulating spin current source in the FM background. (a) Time dependence of the total  Skyrmion number Q(t ). Q(0) ≈ −2 is nonzero from the residual anti-Skyrmions in the ferromagnetic background. Blue (red) colored curves correspond to CW (CCW) circulating current with the j0 value indicated for each curve. (b)–(l) Time-dependent snapshots of the spin configuration over the green-circled time interval in (a).