Bunching of fluxons by the Cherenkov radiation in Josephson multilayers

Details Bunching of fluxons by the Cherenkov radiation in Josephson multilayers Bunching of fluxons by the Cherenkov radiation in Josephson multilayers

2000-02-03

arxiv.org/abs/cond-mat/0002051v2

Phys. Rev. B 62, 1414--1420 (2000)

Physics

Condensed Matter

Superconductivity

6 pages + 6 Figures, to be published in Phys. Rev. B on July 1, 2000

Scientific paper

10.1103/PhysRevB.62.1414

A single magnetic fluxon moving at a high velocity in a Josephson multilayer (e.g., high-temperature superconductor such as BSCCO) can emit electromagnetic waves (Cherenkov radiation), which leads to formation of novel stable dynamic states consisting of several bunched fluxons. We find such bunched states in numerical simulation in the simplest cases of two and three coupled junctions. At a given driving current, several different bunched states are stable and move at velocities that are higher than corresponding single-fluxon velocity. These and some of the more complex higher-order bunched states and transitions between them are investigated in detail.

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