Periodic and non-periodic current steps in I-V characteristics in mesoscopic intrinsic Josephson junctions of Bi2212

摘要

We have studied the dynamical nature of Josephson vortices in an intrinsic Josephson junction by current-voltage characteristics measurements along the c-axis of the mesoscopic Bi2Sr2CaCu2O8+delta single crystals. We found periodic and non-periodic current steps with respect to the voltage. The former resembles the Fiske resonance observed in a single junction and the latter is considered to be peculiar to intrinsic Josephson junctions. (c) 2005 Elsevier B.V. All rights reserved.