Resonance phenomena in asymmetric superconducting quantum interference devices

Abstract

Theory of self induced resonances in asymmetric two-junction interferometer device is presented. In real devices it is impossible to have an ideal interferometer free of imperfections. Thus, we extended previous theoretical approaches introducing a model which contains several asymmetries: Josephson current $\epsilon$, capacitances $\chi$ and dissipation $\rho$ presented in an equivalent circuit. Moreover, non conventional symmetry of the order parameter in high temperature superconducting quantum interference devices forced us to include phase asymmetries. Therefore, the model has been extended to the case of $\pi$-shift interferometers, where a phase shift is present in one of the junctions.

accepted to PRB, low quality figures

References in corpus (6)

• Quiet SDS Josephson Junctions for Quantum Computing
• Anomalous Periodicity of the Current-Phase Relationship of Grain-Boundary Josephson Junctions in High-Tc Superconductors
• Dynamical effects of an unconventional current-phase relation in YBCO dc-SQUIDs
• Electronic Transport through YBCO Grain Boundary Interfaces between 4.2 K and 300 K
• Degenerate ground state and anomalous flux hysteresis in an YBa2Cu3O7 grain boundary r.f. SQUID
• Normal state properties of high angle grain boundaries in (Y,Ca)Ba2Cu3O7-delta

Cited by in corpus (1)

• Frequency-Phase-Locking Mechanism inside DC SQUIDs and The Analytical Expression of Current-Voltage Characteristics