Magnetic oscillations of critical current in intrinsic Josephson-junction stacks

Abstract

A key phenomenon related to the Josephson effect is oscillations of different properties of superconducting tunneling junctions with magnetic field. We consider magnetic oscillations of the critical current in stacks of intrinsic Josephson junctions, which are realized in mesas fabricated from layered high-temperature superconductors. The oscillation behavior is very different from the case of a single junction. Depending on the stack lateral size, oscillations may have either the period of half flux quantum per junction (wide-stack regime) or one flux quantum per junction (narrow-stack regime). We study in detail the crossover between these two regimes. Typical size separating the regimes is proportional to magnetic field meaning that the crossover can be driven by the magnetic field. In the narrow-stack regime the lattice structure experiences periodic series of phase transitions between aligned rectangular configuration and triangular configuration. Triangular configurations in this regime is realized only in narrow regions near magnetic-field values corresponding to integer number of flux quanta per junction.

17 pages, 11 figures, subm. Phys. Rev. B

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Cited by in corpus (10)

• Resonant electromagnetic emission from intrinsic Josephson-junction stacks with laterally modulated Josephson critical current
• Stability of dynamic coherent states in intrinsic Josephson-junction stacks near internal cavity resonance
• Intrinsic Josephson junctions in the iron-based multi-band superconductor (V2Sr4O6)Fe2As2
• Stabilization of in-phase fluxon state by geometrical confinement in small Bi-2212 mesa structures
• Josephson vortex lattice in layered superconductors
• Scaling behavior of the crossover to short-stack regimes of Josephson vortex lattices in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ stacks
• Fluctuating pancake vortices revealed by dissipation of Josephson vortex lattice
• Critical current oscillations in the intrinsic hybrid vortex state of SmFeAs(O,F)
• Coexisting multiple dynamic states generated by magnetic field in Bi-2212 stacked Josephson junctions
• Size-dependent transformation from triangular to rectangular fluxon lattice in Bi-2212 mesa structures