Driven Heisenberg Magnets: Nonequilibrium Criticality, Spatiotemporal Chaos and Control
Jayajit Das, Madan Rao, Sriram Ramaswamy
Abstract
We drive a d-dimensional Heisenberg magnet using an anisotropic current. The continuum Langevin equation is analysed using a dynamical renormalization group and numerical simulations. We discover a rich steady-state phase diagram, including a critical point in a new nonequilibrium universality class, and a spatiotemporally chaotic phase. The latter may be `controlled' in a robust manner to target spatially periodic steady states with helical order.
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