6 September 2000 Josephson plasma emission from tunnel-injected nonequilibrium high-Tc superconductors
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Abstract
We report on the novel nonequilibrium microwave emissions from quasiparticle-injected high-Tc superconductors. The phenomena have been observable for the current-injected YBa2Cu3O7- y(YBCO)/I/Au or Bi2Sr2CaCu2Oy(BSCCO)/I/Au thin- film tunnel junctions and BSCCO single-crystal mesa samples. For the thin-film tunnel junctions, the emitted radiation appears as broadband. The different emission characteristics between the YBCO and BSCCO tunnel junctions strongly suggest the possibility of Josephson plasma emission. On the other hand, for the mesa samples, the radiation appears as three different modes depending on the bias point in the hysteretic current-voltage characteristics: Josephson self-emission, nonequilibrium broad emission and sharp emission. The latter two emission are identified as Josephson plasma emission.
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Ienari Iguchi, Ienari Iguchi, Wan Wang, Wan Wang, Kiejin Lee, Kiejin Lee, Eiji Kume, Eiji Kume, Hiroki Takahashi, Hiroki Takahashi, } "Josephson plasma emission from tunnel-injected nonequilibrium high-Tc superconductors", Proc. SPIE 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV, (6 September 2000); doi: 10.1117/12.397844; https://doi.org/10.1117/12.397844
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