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Letter
Nature Physics 4, 32–36 (1 January 2008) | doi:10.1038/nphys780
Imaging spontaneous currents in superconducting arrays of |[pi]|-junctions
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Abstract
A charge current can flow between two superconductors separated by a thin barrier. This phenomenon is the Josephson effect, which enables a current to tunnel at zero voltage, typically with no phase shift between the superconductors in the lowest-energy state.
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