Spectroscopy of the Fractional Vortex Eigenfrequency in a Long Josephson 0−κ 
Junction

Buckenmaier, K; Gaber, T; Siegel, M; Koelle, D; Kleiner, R; Goldobin, E

doi:10.1103/PhysRevLett.98.117006

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Spectroscopy of the Fractional Vortex Eigenfrequency in a Long Josephson 0−κ Junction

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https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.117006
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Citation

Buckenmaier, K., Gaber, T., Siegel, M., Koelle, D., Kleiner, R., & Goldobin, E. (2007). Spectroscopy of the Fractional Vortex Eigenfrequency in a Long Josephson 0−κ Junction. Physical Review Letters, 98(11): 117006, pp. 1-4. doi:10.1103/PhysRevLett.98.117006.

Cite as: https://hdl.handle.net/21.11116/0000-000A-1C24-F

Abstract

Fractional Josephson vortices carry a magnetic flux Φ, which is a fraction of the magnetic flux quantum Φ0≈2.07×10−15 Wb. Their properties are very different from the properties of the usual integer fluxons. In particular, fractional vortices in 0−κ Josephson junctions are pinned and have an oscillation eigenfrequency which is expected to be within the Josephson plasma gap. Using microwave spectroscopy, we investigate the dependence of the eigenfrequency of a fractional Josephson vortex on its magnetic flux Φ and on the bias current. The experimental results are in good agreement with the theory.