Dynamics of vortex glass phase in strongly type II superconductors.pdfVIP

Dynamics of vortex glass phase in strongly type II superconductors Qing-Hu Chen1,2,3 1 Department of Physics, Zhejiang Normal University, Jinhua 321004, P. R.China 2 Department of Physics, Zhejiang University, Hangzhou 310027, P. R.China 3 Computational Materials Science Center, National Institute for Materials Science, Tsukuba 305-0047, Japan (Dated: February 10, 2008) Dynamics of vortex matter in strongly type-II superconductors with strong random pinning po- 8 tential is investigated within the frustrated 3D XY model. A strong evidence for finite temperature 0 vortex glass transition in the unscreened limit is given. By dynamical scaling, both static and dynam- 0 ical exponents in glass transition are extracted from the simulated IV data. A genuine continuous 2 depinning transition is found at zero temperature. For low temperature creep motion, critical expo- nents and scaling functions are evaluated, and a non-Arrhenius creep motion is observed in vortex b e glass phase. F 0 The industrialized application of superconductors cru- observed the evidence of the VG transition in the un- 1 cially depends on the high electricity transport without screened limit by two typical sets of parameters[13, 14], ] dissipation. However, the resistivity would always be but universal good scaling for some quantities was not n nonzero even in the presence of pining centers. This achieved[15], possibly due to small system sizes accessed. o conventional picture has