Insulating state of granular superconductors in a strong-coupling regime

Abstract

We analyze the possibility of the formation of a magnetic-field-induced insulating state in a two-dimensional granular superconductor with relatively strong intergranular coupling and show that such a state appears in a model with spatial variations of the single-grain critical magnetic field. This model describes realistic granular samples with the dispersion in grain sizes and explains the mechanism leading to a giant peak in the magnetoresistance.

arXiv comment6 pages, 3 figures. Version 3: extended, added discussion of experiment. Final version as published in PRB

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Cited by in corpus (5)

• Granular Electronic Systems
• Localized Superconductivity in the Quantum-Critical Region of the Disorder-Driven Superconductor-Insulator Transition in TiN Thin Films
• Electrical Control of the Superconducting-to-Insulating Transition in Graphene/Metal Hybrids
• Collective transport in the insulating state of Josephson junction arrays
• Disorder Influences the Quantum Critical Transport at a Superconductor to Insulator Transition