Two-dimensional diffusion in the presence of topological disorder.
How topological defects affect the dynamics of particles hopping between lattice sites of a distorted, two-dimensional crystal is addressed. Perturbation theory and numerical simulations show that weak, short-ranged topological disorder leads to a finite reduction of the diffusion coefficient. Renormalization group theory and numerical simulations suggest that longer-ranged disorder, such as that from randomly placed dislocations or random disclinations with no net disclinicity, leads to subdiffusion at long times.
Chen
Ligang
L
Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA.
Deem
Michael W
MW