Microscopic self-consistent theory of Josephson junctions including dynamical electron correlations

Microscopic self-consistent theory of Josephson junctions including dynamical electron correlations

We have developed a rapid computational algorithm that allows for a fully self-consistent solution of the three-dimensional Bogoliubov–de Gennes equations for a Josephson junction. This microscopic model is appropriate for short-coherence-length superconductors, Josephson junctions with strongly correlated proximity-coupled weak links and systems where the barrier thickness is the same order of...

Microscopic tunneling theory of long Josephson junctions.

Microscopic nonequilibrium theory of double-barrier Josephson junctions

We study nonequilibrium charge transport in a double-barrier Josephson junction, including nonstationary phenomena, using the time-dependent quasiclassical Keldysh Green’s function formalism. We supplement the kinetic equations by appropriate time-dependent boundary conditions and solve the time-dependent problem in a number of regimes. From the solutions, current-voltage characteristics are de...

Self-consistent solution for proximity effect and Josephson current in ballistic graphene SNS Josephson junctions

We use a tight-binding Bogoliubov-de Gennes (BdG) formalism to self-consistently calculate the proximity effect, Josephson current, and local density of states in ballistic graphene SNS Josephson junctions. Both short and long junctions, with respect to the superconducting coherence length, are considered, as well as different doping levels of the graphene. We show that self-consistency does no...

Dynamical Behaviour of Intrinsic Josephson Junctions

Intrinsic Josephson Junctions (IJJs) are the subject of much of research due to their potential applications as high frequency oscillators and detectors in the THz range. A number of previous studies use a single junction model to explain their observations, as no fully agreed model for coupled IJJs exists. The influence of one or more IJJs in the voltage state on other junctions in the IJJ arr...