title: Two-dimensional diffusion in the presence of topological disorder.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA.
authors.forename: Ligang
authors.initials: L
authors.lastname: Chen
authors.forename: Michael W
authors.initials: MW
authors.lastname: Deem