Coulomb interaction and first-order superconductor-insulator transition |
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Authors: | Syzranov S V Aleiner I L Altshuler B L Efetov K B |
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Institution: | Theoretische Physik III, Ruhr-Universit?t Bochum, Bochum, Germany. |
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Abstract: | The superconductor-insulator transition (SIT) in regular arrays of Josephson junctions is studied at low temperatures. We derived an imaginary time Ginzburg-Landau-type action properly describing the Coulomb interaction. The renormalization group analysis at zero temperature T=0 in the space dimensionality d=3 shows that the SIT is always of the first order. At finite T, a tricritical point separates the lines of the first- and second-order phase transitions. The same conclusion holds for d=2 if the mutual capacitance is larger than the distance between junctions. |
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