  The fate of many-body localization in long-range interacting systems is not
fully settled. For instance, the phase boundary between ergodic and many-body
localized regimes is still under debate. Here, we use Floquet dynamics which
can induce many-body localization in a clean long-range interacting system
through spatiotemporal disorder, which are realized by regular operation of
random local rotations. The phase diagram has been determined for two types of
uniform and nonuniform long-range couplings. Our Floquet mechanism shows more
localizing power than conventional static disorder methods as it pushes the
phase boundary in favor of the localized phase. Moreover, our comprehensive
long-time simulations provide strong support for obtained results based on
static analysis.
