Volume 128, Number 2, October 2019
|Number of page(s)||7|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||03 January 2020|
Non-equilibrium vortex annealing of structural disorder in Berezinskii-Kosterlitz-Thouless dynamics of the two-dimensional XY-model
Department of Theoretical Physics, Omsk State University - Omsk 644077, Russia
Received: 1 August 2019
Accepted: 28 October 2019
The non-equilibrium annealing of structural disorder in a two-dimensional XY-model leads to coarsening of defects clusters in cores of spin vortices. We revealed the effect of “inertial” growth of the clusters in coarsening dynamic regime. The calculated transverse stiffness as a function of temperature T and spin concentration p of the system in the high-temperature phase becomes negative and it is described by a power law with temperature-independent exponent . The dynamical scaling leads to the dynamic dependence of the correlation length which can be explained by a shift of the spin vortices friction constant γ induced by annealed disorder.
PACS: 64.60.Ht – Dynamic critical phenomena / 64.60.De – Statistical mechanics of model systems (Ising model, Potts model, field-theory models, Monte Carlo techniques, etc.) / 05.10.Ln – Monte Carlo methods
© EPLA, 2020
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