paper

Possible Dynamic States in Inductively Coupled Intrinsic Josephson Junctions of Layered High- Superconductors

arXiv:0803.4244 · doi:10.1103/PhysRevLett.100.247006

Abstract

Based on computer simulations and theoretical analysis, a new dynamic state is found in inductively coupled intrinsic Josephson junctions in the absence of an external magnetic field. In this state, the plasma oscillation is uniform along the c axis and there are phase kinks, with being an integer, periodic and thus non-uniform in the direction. In the IV characteristics, the state manifests itself as current steps occurring at all cavity modes. Inside the current steps, the plasma oscillation becomes strong, which generates several harmonics in frequency spectra at a given voltage. The recent experiments on terahertz radiations from the mesa of a BSCCO single crystal can be explained in terms of this state.

4 pages, 5 figures; to appear in Phys. Rev. Lett.;

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