Current-dependent flux-flow resistance and resonant current steps in BSCCO intrinsic Josephson junctions

초록

We report a current dependence of flux-flow resistance (FFR) and transport properties in intrinsic Jospehson junctions (IJJs) under magnetic 2 fields parallel to an ab-plane. In Bi2SrCaCu2O8+d IJJS with the ab-plane dimensions of 1.8 X 10.5 mu m(2), the oscillations of FFR have been observed with two apparent periods of 0.382 T in low fields and 0.765 T in high fields. The dominant period H-p=0.765 T is decided by a sample width and corresponds to the field for adding one flux quantum per layer. Under certain conditions, we also observed the mergence of two peaks on the oscillating FFR with half period 1/2H(p) into one peak with the period Hp in low fields and the inversions between bottoms and peaks in high fields. We found that this current-dependent FFR implying information of vortex lattice correlates with the transport properties such as current steps on current-voltage curves. (c) 2005 Elsevier Ltd. All rights reserved.

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