8 papers
Optimizing the speed of a Josephson junction
J. K. Freericks, B. K. Nikolic, P. Miller
We review the application of dynamical mean-field theory to Josephson junctions and study how to maximize the characteristic voltage IcRn which determines the width of a rapid sing…
Reduction of Josephson critical current in short ballistic SNS weak links
Branislav K. Nikolic, J. K. Freericks, P. Miller
We present fully self-consistent calculations of the thermodynamic properties of three-dimensional clean SNS Josephson junctions, where S is an s-wave short-coherence-length superc…
Equilibrium Properties of Double-Screened-Dipole-Barrier SINIS Josephson Junctions
Branislav K. Nikolic, J. K. Freericks, P. Miller
We report on a self-consistent microscopic study of the DC Josephson effect in junctions where screened dipole layers at the interfaces generate a double-barrier multi…
Suppression of the "quasiclassical" proximity gap in correlated-metal--superconductor structures
Branislav K. Nikolic, J. K. Freericks, P. Miller
We study the energy and spatial dependence of the local density of states in a superconductor--correlated-metal--superconductor Josephson junction, where the correlated metal is a…
Tuning a Josephson junction through a quantum critical point
J. K. Freericks, B. K. Nikolic, P. Miller
We tune the barrier of a Josephson junction through a zero-temperature metal-insulator transition and study the thermodynamic behavior of the junction in the proximity of the quant…
Dynamical Charge Susceptibility of the Spinless Falicov-Kimball Model
J. K. Freericks, P. Miller
An exact solution is presented for the frequency-dependent charge susceptibility of the spinless Falicov-Kimball model by using dynamical mean-field theory. We develop a nontrivial…