Josephson Vortex Dynamics in Layered Structures

Ustinov, A. V.

doi:10.1007/978-94-011-4558-9_21

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2000

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“…The results of our consideration can be applied to intrinsically layered HTS materials, 1 since the Josephson-stack model has proved to be appropriate for these structures. [2][3][4] In earlier papers [5][6][7][8] it was shown that, in some cases, a fluxon ͑Josephson vortex͒ moving in one of the layers of the stack may emit electromagnetic ͑plasma͒ waves by means of the Cherenkov mechanism. The fluxon together with its Cherenkov radiation has the profile of a traveling wave, (xϪut), having an oscillating gradually decaying tail.…”

Section: Introductionmentioning

confidence: 99%

Bunching of fluxons by Cherenkov radiation in Josephson multilayers

2000

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A single magnetic fluxon moving at a high velocity in a Josephson multilayer ͑e.g., high-temperature superconductor such as BSCCO͒ can emit electromagnetic waves ͑Cherenkov radiation͒, which leads to the formation of stable dynamic states consisting of several bunched fluxons. We find such bunched states in numerical simulations 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 the 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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