Non-equilibrium critical vortex dynamics of disordered 2D XY-model

International Conference on Computer Simulation in Physics and Beyond 2015

物理学;计算机科学

Popov, Ivan S.^1 ; Prudnikov, Pavel V.^1 ; Prudnikov, Vladimir V.^1

Department of Theoretical Physics, Omsk State University, Omsk

644077, Russia^1

关键词: Critical relaxation;    Critical temperatures;    Disordered system;    Non equilibrium;    Spin concentration;    Spin wave approximation;    Temperature dependence;    Transverse stiffness;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/681/1/012015/pdf
DOI  :  10.1088/1742-6596/681/1/012015

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Vortex dynamics and clustering in non-equilibrium critical relaxation of disordered 2D XY-model are investigated for different initial states. Time dependencies of vortex concentration and clusters sizes are studied for different spin concentrations. The anomalous slow down of clustering in disordered system are explained by pinning of vortices on defects. The calculated temperature dependence of transverse stiffness allows to estimate critical temperature Tbkt and applicability of spin-wave approximation for disordered system.