Direct Numerical Experiments on Superconducting Plasma and Intrinsic Josephson Effects in Layered High- Tc Superconductors

Abstract

We derive a novel model (KT model) on dynamics of the phase difference between neighboring layers in Josephson coupled High-Tc superconductors (HTSC’s) from the time-dependent Ginzburg-Landau theory at T=0 in order to investigate how charging effects in superconducting layers have influences on Josephson effects as I-V characteristics. We perform numerical simulations on the KT model, and find that typical I-V characterisitcs show multiple branch structures similar to experimental results in Josephson coupled HTSC’s. From simulation results, we find that each branch can be distiguished by differences between generated charge density waves (CDW’s), while we theoretically show that an origin of CDW is freezing of the longitudinal plasma motion.