Long-range superharmonic Josephson current |
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Authors: | Trifunovic Luka |
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Institution: | Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. |
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Abstract: | We consider a long superconductor-ferromagnet-superconductor junction with one spin-active region. It is shown that an odd number of Cooper pairs cannot have a long-range propagation when there is only one spin-active region. When the temperature is much lower than the Thouless energy, the coherent transport of two Cooper pairs becomes the dominant process and the superharmonic current-phase relation is obtained (I ∝ sin2?). |
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