2006/10/02 by K. Buckenmaier, Kai Buckenmaier, T. Gaber +4 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.98.117006
published as Phys. Rev. Lett. 98, 117006, (2007) · submitted to PRL
arxiv created 2006/10/02 · openalex publication_date 2007/03/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Fractional Josephson vortices carry a magnetic flux \ensuremathΦ, which is a fraction of the magnetic flux quantum \ensuremathΦ0\ensuremath≈2.07\ifmmode×\else\texttimes\fi10^\ensuremath-15 Wb. Their properties are very different from the properties of the usual integer fluxons. In particular, fractional vortices in 0\mathrm\text\ensuremath-\ensuremathκ 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 \ensuremathΦ and on the bias current. The experimental results are in good agreement with the theory.