Periodic oscillations, peak-splitting and phase transitions of Josephson vortex flow resistance in Bi2Sr2CaCu2O8+δ -: art. no. 174514

We investigate both experimentally and theoretically transport properties of the Josephson vortices (JV) with a finite bias current along the c axis of the intrinsic Josephson junctions in layered high-T-c superconductor of Bi2Sr2CaCu2O8+delta. Employing the perturbed sine-Gordon equation and integrating a novel characterization factor of the difference between current distributions on neighboring layers Delta J, we are successful in explaining new phenomena such as (1) oscillation with period H-p corresponding to adding one JV per layer, (2) its peak splitting, and (3) reverse of the peaks and valleys with increase of current in JV flow resistance as a function of magnetic field observed in our experiments. Additionally, our simulation shows concrete evidence for the sample size dependent phase transition between H-p/2-period and H-p-period oscillations. The novel phenomena are expected to be useful for designing practical devices in experiments.