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VOLUME 65 (1997) | ISSUE 1 | PAGE 96
On phase ordering behind the 1 propagating front of a second order-transition
In a real system the heating is nonuniform and a second-order phase transition into a broken symmetry phase occurs by propagation of the temperature front. Two parameters, the cooling rate tq and the velocity νχ of the transition front, determine the nucleation of topological defects. Depending on the relation of these parameters two regimes are found: in the regime of fast propagation defects are created according to the Zurek scenario for the homogeneous case, while in the slow propagation regime vortex formation is suppressed. PACS: ll.27.-f-d, 67.40.Vs, 67.57.Fg, 98.80.Cq