Magnetization relaxation rate as a function of superexchange energy scale
Our group has recently observed non-equilibrium manybody dynamics governed by both superexchange and tunneling mechanisms. Using dynamical control of our lattice, we constructed non-equilibrium anti-feromagnetic order and observed the subsequent magnetization relaxation. By tuning tuning the relative superexchange and tunneling energy scales, we can identify the mechanisms for relaxation, and work in a regime dominated by super-exchange despite the presence of vacancies. The figure above shows one of the main results, relaxation timescales that collapse as a function of the superexchange energy scale over two orders of magnitude. In the future, we plan to extend this experiment to explroe adiabatic preparation antiferromagnetic order. The paper is to appear in Science Magazine.