Spectroscopy of the Fractional Vortex Eigenfrequency in a Long Josephson 0−κ Junction
K. Buckenmaier, T. Gaber, M. Siegel, D. Koelle, R. Kleiner, E. Goldobin
DOI 10.1103/PhysRevLett.98.117006 · Physical Review Letters
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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