Super-Diffusion in Random Chains with Correlated Disorder
| dc.contributor.author | Evangelou, S. N. | en |
| dc.contributor.author | Katsanos, D. E. | en |
| dc.date.accessioned | 2015-11-24T18:34:32Z | |
| dc.date.available | 2015-11-24T18:34:32Z | |
| dc.identifier.issn | 0375-9601 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16959 | |
| dc.rights | Default Licence | - |
| dc.subject | one-dimensional systems | en |
| dc.subject | spectral singularities | en |
| dc.subject | localization | en |
| dc.title | Super-Diffusion in Random Chains with Correlated Disorder | en |
| heal.abstract | We study the spin-wave dynamics of the one-dimensional Heisenberg ferromagnet with random exchange couplings J. The problem becomes equivalent to considering an electronic wavepacket put on an initial site in a chain with correlated off-diagonal disorder, where the bonds are random in pairs. The mean-square displacement of the wavepacket versus time is shown to display asymptotically super-diffusion (sigma-2(t) approximately t3/2) and localization (sigma-2(t) approximately const), depending on whether the average over the disorder [l/J] exists or not. In the critical intermediate case ordinary diffusion sigma-2(1) approximately t is obtained. We show that the dynamical behaviour relates closely to the corresponding spectral density and the localization length singularities whose type is demonstrated. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1016/0375-9601(92)90114-2 | - |
| heal.identifier.secondary | <Go to ISI>://A1992HU65800018 | - |
| heal.identifier.secondary | http://ac.els-cdn.com/0375960192901142/1-s2.0-0375960192901142-main.pdf?_tid=a599bd36-363e-11e3-8192-00000aacb35f&acdnat=1381913024_98425fa57786d47be19d4f4d2641a04d | - |
| heal.journalName | Physics Letters A | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 1992 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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