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Superconducting to normal state phase boundary in arrays of ultrasmall Josephson junctions

Jorge V. José, Cristian Rojas

cond-matarXiv:cond-mat/9407062

Abstract

We study the competition between Josephson and charging energies in two-dimensional arrays of ultrasmall Josephson junctions, when the mutual capacitance is dominant over the self-capacitance. Our calculations involve a combination of an analytic WKB renormalization group approach plus nonperturbative Quantum Monte Carlo simulations. We consider the zero frustration case in detail and we are able to make a successful comparison between our results and those obtained experimentally.

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