Influence of the Heat Transfer on Dynamic Properties of Mesoscopic Superconducting Strips: A Finite Element Method

Yajing Wanga, Lin Penga, Jia Lina, Yufeng Zhanga, Lina Sangb aDepartment of Physics, Shanghai University of Electric Power, Shanghai 201300, China bInstitute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials, University of Wollongong, NSW 2500, Australia

Received: November 24, 2019; revised version January 11, 2020; in final form January 29, 2020

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Using a finite element method to numerically solve the time-dependent Ginzburg-Landau equations, we studied the dynamic properties of the mesoscopic superconducting strips. We obtain the different voltage-current, free energy-time, and vortex evolution patterns for different temperatures conditions and applied current. Our results show that the temperature and the applied current directly influence the dynamics of the superconducting condensate and lead to the variations of threshold current and the periodic oscillations of the free energy across the strips with a frequency.

DOI:10.12693/APhysPolA.137.1116 topics: threshold current, periodic oscillations, time-dependent Ginzburg-Landau equations, finite element method\\vs*{10pt}