Nanoscale spintronic oscillators based on the excitation of confined soliton modes

This paper demonstrates how to excite complex soliton modes in nanomagnets with perpendicular to plane magnetic anisotropy driven by the non-uniform injection of a spin-polarized current. We addressed the study toward two different scenarios, in the first the excitation of two rotating bubble/antibubble pairs is predicted, in the second one, by means of the topological charge, we characterized the dissipative droplet recently measured as single constrained bubble/antibubble pair. Our results are important in the theoretical understanding on how control the spatial structure of soliton modes for application in spintronics, magnonics and domain wall devices. Finally, we propose to use those nanoscale microwave oscillators as basis for next generation of distributed on-chip clock.