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Superconductor-to-insulator transition in linear arrays of Josephson junctions capacitively coupled to metallic films

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Published in Physical Review. B, Condensed Matter. 2011, vol. 84, no. 2
Abstract We study the low-temperature properties of linear Josephson-junction arrays capacitively coupled to a proximate two-dimensional diffusive metal. Using bosonization techniques, we derive an effective model for the array and obtain its critical properties and phases at T=0 using a renormalization-group analysis and a variational approach. While static screening effects given by the presence of the metal can be absorbed in a renormalization of the parameters of the array, backscattering originated in the dynamically screened Coulomb interaction produces a nontrivial stabilization of the insulating ground state and can drive a superconductor-to-insulator transition. We study the consequences for the transport properties in the low-temperature regime. In particular, we calculate the resistivity as a function of the temperature and the parameters of the array, and obtain clear signatures of a superconductor-to-insulator transition that could be observed in experiments.
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LOBOS, Alejandro, GIAMARCHI, Thierry. Superconductor-to-insulator transition in linear arrays of Josephson junctions capacitively coupled to metallic films. In: Physical Review. B, Condensed Matter, 2011, vol. 84, n° 2. https://archive-ouverte.unige.ch/unige:35995

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Deposited on : 2014-04-28

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