Program

P.61 -- Poster, NCTP-40

Date: Tuesday, 28 July 2015

Time: 08h30 - 10h00

The ab-plane complex conductivity in type-II superconductor

Bui Duc Tinh (1), Nguyen Quang Hoc (1), Nguyen Duc Hien (2)

(1) Department of Physics, Hanoi National University of Education, 136 Xuan Thuy Street, Cau Giay District, Hanoi, Vietnam; (2) Mac Dinh Chi Secondary School, Chu Pah District, Gia Lai Province, Vietnam

In this paper we use the time-dependent Ginzburg-Landau to calculate ab-plane complex fluctuation conductivity in type-II superconductor in 3D model under magnetic field. We assume that thermal fluctuations are strong enough to melt the Abrikosov vortex lattice by the magnetic field into a vibrating vortex liquid. The nonlinear interaction term in the time dependent Ginzburg-Landau is treated within self-consistent Gaussian approximation. An additional assumption often made in analytical calculations that only the lowest Landau level significantly contributes to physical quantities of interest in the high-field limit is lifted by including all the Landau levels. We obtain expression for the ab-plane complex conductivity summing all Landau levels which are applicable essentially to whole liquid phase and is compared to experimental data on high-Tc superconductor YBa2Cu3O7-$\delta$. Keywords: Complex conductivity; Type-II superconductor

Presenter: Nguyễn Đức Hiền