1 Theoretical Atomic-scale Physics, Department of Physics, Technical University of Denmark2 Department of Physics, Technical University of Denmark3 Biophysics and Fluids, Department of Physics, Technical University of Denmark4 Technical University of Denmark
Current-voltage (I-V) characteristics of long Josephson junctions with a periodic lattice of localized inhomogeneities are studied. The interaction between the moving fluxons and the inhomogeneities causes resonant steps in the IV-curve. Some of these steps are due to a synchronization to resonant Fiske modes in the sub-junctions formed between the inhomogeneities. The voltage positions of the resonant steps oscillate as function of the applied magnetic field with a period corresponding to the inclusion of one magnetic flux quantum, Φ0=h/2e, per sub-junction. A qualitative explanation that takes into account the interaction between the resonance in the sub-junction and the magnetic flux density waves excited in the whole junction is given.
I E E E Transactions on Applied Superconductivity, 1995, Vol 5, Issue 2, p. 2947-2950