Spectroscopy of the fractional vortex eigenfrequency in a long Josephson 0-kappa junction

Details Spectroscopy of the fractional vortex eigenfrequency in a long Josephson 0-kappa junction Spectroscopy of the fractional vortex eigenfrequency in a long Josephson 0-kappa junction

2006-10-02

arxiv.org/abs/cond-mat/0610043v1

Phys. Rev. Lett. 98, 117006, (2007)

Physics

Condensed Matter

Superconductivity

submitted to PRL

Scientific paper

10.1103/PhysRevLett.98.117006

Fractional Josephson vortices carry a magnetic flux Phi, which is a fraction of the magnetic flux quantum Phi_0 ~ 2.07x10^{-15} Wb. Their properties are very different from the properties of the usual integer fluxons. In particular, fractional vortices 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 $\Phi$ and on the bias current. The experimental results are in good agreement with the theoretical predictions.

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