  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 non-trivial stabilization of the insulating
groundstate and can drive a superconductor-insulator transition. We study the
consequences for the transport properties in the low-temperature regime. In
particular, we calculate the resisitivity as a function of the temperature and
the parameters of the array, and obtain clear signatures of a
superconductor-insulator transition that could be observed in experiments.

Superconductivity