Nonlocal electrodynamics of long ultranarrow Josephson junctions: Experiment and theory

Abdumalikov A, Kurin V, Helm C, De Col A, Koval Y, Ustinov A (2006)


Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2006

Journal

Publisher: American Physical Society

Pages Range: 134515

Journal Issue: 74

URI: http://www.fluxongroup.physik.uni-erlangen.de/publications/2006/Abdumalikov-PRB-2006.pdf

DOI: 10.1103/PhysRevB.74.134515

Abstract

We experimentally and theoretically investigate electromagnetic cavity modes in ultranarrow Al- AlOx -Al and Nb- AlOx -Nb long Josephson junctions. Experiments show that the voltage spacing between the Fiske steps on the current-voltage characteristics of sub- μm -wide and several hundred μm -long Al- AlOx -Al and Nb- AlOx -Nb Josephson junctions increases when decreasing the junction width. This effect is explained by stray magnetic fields, which become important for narrow junctions. Theoretical estimates of the Fiske step voltage based on a nonlocal wave propagation equation are in agreement with our experimental data. Using the nonlocal model, we determine the size and mass of a Josephson vortex by means of a variational approach, and relate the vortex size to the experimentally measured critical magnetic field of the junction. © 2006 The American Physical Society.

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How to cite

APA:

Abdumalikov, A., Kurin, V., Helm, C., De Col, A., Koval, Y., & Ustinov, A. (2006). Nonlocal electrodynamics of long ultranarrow Josephson junctions: Experiment and theory. Physical Review B, 74, 134515. https://dx.doi.org/10.1103/PhysRevB.74.134515

MLA:

Abdumalikov, Abdufarrukh, et al. "Nonlocal electrodynamics of long ultranarrow Josephson junctions: Experiment and theory." Physical Review B 74 (2006): 134515.

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