Figure 1.

(a) The gyrotropic motion of the vortex core around the center of the disc can be described by the radius r and phase, θ. (b) Two vortex based STO separated by a distance d_ij, showing the curling magnetization in the disc plane and the location of the vortex core indicated in black. (c) Network model for an array of STO. The interaction strength is determined by the spacing d_ij and we include interactions within a coupling radius R, indicated by the blue circle in the figure. The local correlation function β_i at position i (blue) is given by the degree of synchronization with its neighbors (red).