Controllable plasma energy bands in a 1D crystal of fractional Josephson vortices

Details Controllable plasma energy bands in a 1D crystal of fractional Josephson vortices Controllable plasma energy bands in a 1D crystal of fractional Josephson vortices

2004-12-11

arxiv.org/abs/cond-mat/0412295v1

Phys. Rev. B 71, 174510, (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 2 Figs

Scientific paper

10.1103/PhysRevB.71.174510

We consider a 1D chain of fractional vortices in a long Josephson junction with alternating $\pm\kappa$ phase discontinuities. Since each vortex has its own eigenfrequency, the inter-vortex coupling results in eigenmode splitting and in the formation of an oscillatory energy band for plasma waves. The band structure can be controlled at the design time by choosing the distance between vortices or \emph{during experiment} by varying the topological charge of vortices or the bias current. Thus one can construct an artificial vortex crystal with controllable energy bands for plasmons.

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