Abstract
We report complex plasma experiments, assisted by numerical simulations, providing an alternative qualitative link between the macroscopic response of polycrystalline solid matter to small shearing forces and the possible underlying microscopic processes. In the stationary creep regime we have determined the exponents of the shear rate dependence of the shear stress and defect density, being and , respectively. We show that the formation and rapid glide motion of dislocation pairs in the lattice are dominant processes.
- Received 24 September 2013
DOI:https://doi.org/10.1103/PhysRevLett.113.025002
© 2014 American Physical Society