Influence of thermal gradient in vortex states of mesoscopic superconductors

27th International Conference on Low Temperature Physics

Duarte, E.C.S.^1 ; Presotto, A.^1 ; Okimoto, D.^1 ; Sardella, E.^2,3 ; Zadorosny, R.^1

Departamento de Física e Química, Univ. Estadual Paulista-Unesp, Ilha Solteira, SP

CEP 15385-000, Brazil^1

UNESP-Universidade Estadual Paulista, Faculdade de Ciencias, Departamento de Física, Bauru-SP

CEP 17033-360, Brazil^2

UNESP-Universidade Estadual Paulista, IPMet-Instituto de Pesquisas Meteorológicas, Bauru-SP

CEP 17048-699, Brazil^3

关键词: Asymmetric distribution;    Confinement effects;    Finite size effect;    Mesoscopic superconductors;    Temperature parameters;    Time dependent Ginzburg-Landau equations;    Vortex configurations;    Vortex dynamics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/2/022011/pdf
DOI  :  10.1088/1742-6596/568/2/022011

来源: IOP

【 摘 要 】

In general, The studies of finite size effects in mesoscopic superconductors have been carried out in such a way that The temperature parameter is constant in The entire system. However, we could have situations where a real sample is near a heater source, as an example. In such situations, gradients of temperature are present. On The other hand, mesoscopic superconductors are interesting systems due to The fact that they present confinement effects which influence all The vortex dynamics. Thus, in this work we studied The influence of thermal gradients on The vortex dynamics in mesoscopic superconductors. For this purposes, we used The time dependent Ginzburg-Landau equations. The thermal gradients produce an asymmetric distribution of The currents around The system which, in turn, yield interesting vortex configurations and difficult The formation of giant vortices.