Title: Dynamic transitions in moving vortex system subject quenched disorder
Speaker: Professor I. Aranson
Speaker Info: Argonne Natl. Lab and Bar-Ilan U.
The bifurcations in a driven periodic system (we focused on the lattice of Abrikosov vortices for definitness) subject to the quenched disorder are investigated analytically and by numerical simulations of the quasi three-dimensional time-dependent Ginzburg-Landau equations. We have found two distinct dynamic transitions: dynamic melting transition, similar to two-dimensional system (abrupt drop in the number of lattice defects), and the dynamic alignment transition, which occurs only in three-dimensional system. A universal structure of the bifurcation lines as functions of renormalized parameters of the problem is established.Date: Friday, February 21, 1997