Simple description of shear dynamics of glasses with crystalline local order

[摘要] For those glassformers (especially metallic glasses), which structure may be presented as a set of linear topological defects embedded into a media with crystalline local order, we suggest a description of the shear dynamics in terms of kinks motion along the topological defect lines, as it is customary for crystalline materials. Locally, these defects are similar to dislocations and disclinations. For the motion of the kink, we write out the Fokker - Planck equation in a self - consistent potential. The glass transition occurs to be described as a localization of the kink.

[发布机构] Ural Federal University, 19 Mira st., Ekaterinburg; 620002, Russia^1

[效力级别] 数学

[关键词] Dislocations and disclinations;Glassformers;Local order;Shear dynamics;Topological defect