Current–voltage characteristics of asymmetric double-barrier Josephson junctions
نویسندگان
چکیده
Article history: Received 17 January 2014 Accepted 2 February 2014 Available online 10 February 2014
منابع مشابه
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...
متن کاملDouble-Barrier Josephson Junctions: Theory and Experiment
New theoretical and experimental results on double-barrier SIS’IS Josephson junctions are presented (1 is a tunnel barrier, S’ is a thin film with critical temperature lower than that of S). The previously developed microscopic model for the stationary case, which describes the critical currents in Nb/AI/Nb junctions, is extended to the non-equilibrium regime of finite voltage. In particular, a...
متن کاملCurrent-phase relation of double-barrier Josephson junctions with a two-gap superconductor as intermediate electrode
The current-phase (I-φ) relation of a double-barrier Josephson junction with a two-gap superconductor as intermediate electrode is derived by means of a simplified version of Ohta’s model. As in conventional double-barrier Josephson junctions, a marked skewness in the I-φ curves is present. Moreover, as in heterotic Josephson devices, a reduction of the maximum Josephson current is predicted. A...
متن کاملJosephson junctions and DC SQUIDS based on Nb/Al technology.
A process for fabricating high-quality Josephson junctions and DC SQUIDs on basis of Nb/Al technology has been developed. DC magnetron sputtering is used for the deposition of the metal layers and the barrier is formed by thermal oxidation of the Al-layer. The junction area of 5 microns x 5 microns is obtained using anodisation. Three types of Josephson tunnel junctions have been prepared: stan...
متن کامل0 Resonances in one and two rows of triangular Josephson junction cells
We present an experimental and analytical study of resonances in the current-voltage characteristics of single and double row triangular Josephson arrays. The magnetic field dependences of the voltage positions of the resonances have been measured for various cell inductances and junction critical currents. In double row arrays, we have observed a peculiar resonance, whose voltage position decr...
متن کامل