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Soliton dynamics in Josephson tunnel junctions

Doderer, T; Lachenmann, S G; Ustinov, A V; Quenter, D; Huebener, R P

Abstract:
The non-linear dynamics of Josephson junctions is well described by the perturbed sine-Gordon equation together with the appropriate boundary conditions. A possible solution of the pure sine-Gordon equation are solitons. In the junction the (quasi) solitons manifest themselves as Josephson vortices, each of them carrying one magnetic flux quantum. We used the technique of Low Temperature Scanning Electron Microscopy to study the soliton dynamics in superconducting tunnel junctions of various geometries. The electron beam power can be adjusted to work in different regimes. For high power, the beam acts as an active probe and we were able to introduce individual solitons in annular junctions one by one and studied multisoliton behavior without the influence of boundaries. For low power, the beam acts as a passive probe influencing the soliton dynamics in a well controlled way. Here, we investigated details of the dynamic soliton behavior.



Originalveröffentlichung
DOI: 10.1088/0031-8949/1993/T49A/028
Scopus
Zitationen: 5
Web of Science
Zitationen: 4
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 1993
Sprache Englisch
Identifikator ISSN: 0031-8949, 1402-4896
KITopen-ID: 1000077323
Erschienen in Physica scripta
Band T49A
Seiten 172–175
Nachgewiesen in Scopus
Web of Science
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