  Recent experiments have shown that magnetic skyrmion bubbles can be generated
and injected at room temperature in thin films [W. Jiang et al, Science vol.
349, 283 (2015)]. Here, we demonstrate, using micromagnetic modeling, that such
skyrmions can be generated by an inhomogeneous spin Hall torque in the presence
of Dzyaloshinskii-Moriya interactions (DMIs). In the experimental
Ta/Co$_{20}$Fe$_{60}$B$_{20}$ thin films, the DMI is rather small;
nevertheless, the skyrmion bubbles are stable, or at least metastable on
observational time scales.
