  Although scaling phenomena have long been documented in crystalline
plasticity, the universality class has been difficult to identify due to the
rarity of avalanche events, which require large system sizes and long times in
order to accurately measure scaling exponents and functions. Here we present
comprehensive simulations of two-dimensional dislocation dynamics under shear,
using finite-size scaling to extract scaling exponents and the avalanche
profile scaling function from time-resolved measurements of slip-avalanches.
Our results provide compelling evidence that both the static and dynamic
universality classes are consistent with the mean-field interface depinning
model.
