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Magnetic flux quanta in annular Josephson junctions in a barrier-parallel dc magnetic field

Keil, S.; Vernik, I. V.; Doderer, T.; Laub, A.; Preβler, H.; Huebener, R. P.; Thyssen, N.; Ustinov, Alexey V.; Kohlstedt, H.

Abstract:
Flux quanta (fluxons) trapped in an annular Josephson junction reside in a spatially periodic pinning potential when a uniform external magnetic field is applied parallel to the plane of the junction's tunnel barrier. We investigate the fluxon behavior by measuring the current versus voltage curves, the magnetic dependence of the junction critical current, and by means of spatially resolved measurements imaging the pinned fluxons. We derive the fluxon potential energy including fluxon-fluxon interaction. Fair agreement of this calculation with our experimental results is obtained.


Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 1996
Sprache Englisch
Identifikator ISSN: 0163-1829, 1095-3795, 0556-2805, 1094-1622, 1098-0121, 1550-235X, 2469-9950, 2469-9969
KITopen ID: 1000075710
Erschienen in Physical review / B
Band 54
Heft 21
Seiten 14948–14951
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