- Open Access
Dual relaxation oscillations in a Josephson-junction array
Phys. Rev. Applied 24, 014035 – Published 17 July, 2025
DOI: https://doi.org/10.1103/qvls-7s3q
Abstract
We report relaxation oscillations in a one-dimensional array of Josephson junctions, wherein the array dynamically switches between low-current and high-current states. The oscillations are current-voltage dual to those ordinarily observed in single junctions. The current-voltage dual circuit quantitatively accounts for temporal dynamics of the array, including the dependence on biasing conditions. Injection locking of the oscillations results in well-developed current plateaux. A thermal model explains the self-consistent reduction of the superconducting gap due to overheating of the array in the high-current state. Our work suggests that overheating determines the switching from the high-current state to the low-current state.
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