AC Josephson effect in the long voltage-biased SINIS junction
arXiv:0901.1966 · doi:10.1134/S0021364009040092
Abstract
Theory of non-stationary coherent effects is developed for superconductor-normal-superconductor (SNS) structures with relatively strong normal scattering on S/N interfaces (interface resistance is large compared to intrinsic resistance of N metal). Analitical expressions are found for the time-dependent anomalous Green functions induced in the N region under the fixed-voltage-bias. The amplitude of the current oscillations is determined in non-equilibrium conditions. Non-stationary correction to the distribution function is calculated in high-temperature limit and found to be slowly decreasing with the temperature, leading to the dominance of the second-harmonic term in the Josepshon current at high temperatures and low voltage.
Final version accepted for publication in JETP Letters. Introduction and discussion in the end of Sec.4 are extended, figure and few references added, some numerical coefficients corrected