Programme

P.79 -- Poster, VCTP-45

Date: Wednesday, 14 October 2020

Time: 08:30 - 10:00

Online presentation

Enhancement of the electric current in high-Tc superconductor interacting with an artificial pinning arrayan

Nguyen Minh Hoa1 , Nguyen Quang Hoc2, and Bui Duc Tinh2*

1 Faculty of Basic Sciences, Hue University of medicine and pharmacy, Hue University, Hue, Vietnam 2 Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Ha Noi, Vietnam *) Corresponding author's e-mail: tinhbd@hnue.edu.vn

The dynamics of the flux lattice in the mixed state of high-Tc superconductor interacting with a periodic array of nano-solid (pinning center) is considered. We calculate analytically the current density for the case of the matching field (when the number of vortices is equal to that of the nano-solid) using Ginzburg-Landau equations in a magnetic field in the presence of strong thermal fluctuations. It is found that the current density increase considerably with increasing pinning strength. Physically in the presence of thermal fluctuations when the energy scale of the vortex lattice shear fluctuations becomes comparable to the pinning energy scale, it results in increase of the current density. Keywords (include 3-5 keywords): Type-II superconductor, Ginzburg-Landau equations, Periodic array of nano-solid

Presenter: Nguyen Minh Hoa

Presentation file: