Noise-induced switching between vortex states with different polarization in classical two-dimensional easy-plane magnets

Y. Gaididei, T. Kamppeter, F. G. Mertens +1

In the 2-dimensional anisotropic Heisenberg model with XY-symmetry there are non-planar vortices which exhibit a localized structure of the z-components of the spins around the vor…