  Plastic deformations in crystals often produce textures in the form of
randomly oriented patches of the unstressed lattice. We use a novel mesoscopic
Landau-type model of crystal plasticity to show that in such textures large
crystallographic lattice rotations can originate from a highly coordinated
inelastic slip at the microscale. Our numerical experiments show that
dislocation avalanches, which lead to the formation of such rotations, involve
pseudo-turbulent motions with power-law distributed spatial correlations.

Mesoscale and Nanoscale Physics;Materials Science;Pattern Formation and Solitons;Computational Physics