Dynamical RG on sheared O(n) model identifies new stable Gaussian fixed point with upper critical dimensions d_up=2 (Model A) and d_up=0 (Model B), making mean-field behavior valid in low dimensions and lowering the lower critical dimension below 2.
Hucht, Nonequilibrium phase transition in an exactly solvable driven ising model with friction, Phys
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Dynamical renormalization group analysis of $O(n)$ model in steady shear flow
Dynamical RG on sheared O(n) model identifies new stable Gaussian fixed point with upper critical dimensions d_up=2 (Model A) and d_up=0 (Model B), making mean-field behavior valid in low dimensions and lowering the lower critical dimension below 2.