Simulation studies for the vortex depinning dynamics around a columnar defect in superconductors

超伝導体における柱状欠陥まわりの渦糸ダイナミクスに対するシミュレーション研究

中井 宣之; 林 伸彦; 町田 昌彦  

Nakai, Noriyuki; Hayashi, Nobuhiko; Machida, Masahiko

Using the time-dependent Ginzburg-Landau equation with the complex relaxation rate and Maxwell equation, we perform the numerical simulation of vortex-pinning dynamics in two cases of metal-pinning and insulator-pinning. At the same time, the vortex-flow voltage induced by the vortex-motion and the Hall coefficient are calculated. Numerical simulations reveal that the trapped vortex at the pinning-site disrupts the vortex-motion of non-trapped vortices and the Hall coefficient depends on that vortex-motion.