Diffusion Coefficient of Particles in Lattices with Random-Barriers and wide Distribution of Transition Rates
| dc.contributor.author | Ambaye, Hailemariam | |
| dc.date.accessioned | 2018-06-27T05:59:17Z | |
| dc.date.accessioned | 2023-11-09T11:23:42Z | |
| dc.date.available | 2018-06-27T05:59:17Z | |
| dc.date.available | 2023-11-09T11:23:42Z | |
| dc.date.issued | 1995-06 | |
| dc.description.abstract | We have investigated the mean-square displacements of particles that perform random walks in two and three-dimensional lattices with random barriers with uniform distributions of activation energies. The lattice we considered is a mathematical lattice. For the same model Avramov, Milchev, and Argyrakis [phys.rev.E 47 2303 (1993)] discussed the crossover between anomalous and normal diffusion, but they did not Analyze the behavior of the mean-square dispalcements at long times where normal diffusion occurs. We point out that the asymptotic diffusion coefficients are well described by the effective- medium theory in the range of parameters investigated ; they are in disagreement with the predictions of critical-path arguments in dimension d=3 | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/3817 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Lattices with Random-Barriers | en_US |
| dc.title | Diffusion Coefficient of Particles in Lattices with Random-Barriers and wide Distribution of Transition Rates | en_US |
| dc.type | Thesis | en_US |