Soliton dynamics in two-dimensional Josephson tunnel junctions

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.16623· OSTI ID:5751243

Lachenmann, S G; Filatrella, G; Doderer, T; Fernandez, J C; Huebener, R P ^[1]

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1. Lehrstuhl Experimentalphysik II, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

We observe a zero-field current step (ZFS) in several square Josephson tunnel junctions of intermediate size (i.e., size [congruent][lambda][sub [ital j]]). This step clearly shows soliton-type motion along the two diagonals of the junction as predicted by Turlot [ital et] [ital al]. [Phys. Rev. B 42, 8418 (1990)], called isoperimetric pattern dynamics (IPD). In addition to the information given by the current-voltage characteristic, the dynamical behavior is investigated using low-temperature scanning electron microscopy (LTSEM). In parallel, extensive numerical simulations are performed to simulate the effect of the LTSEM hot spot'' on the IPD dynamics governed by a two-dimensional perturbed sine-Gordon equation. The comparison between the experimental data obtained by the LTSEM technique and numerical simulations clearly shows the validity of the IPD model in order to explain the observed ZFS.

• OSTI ID: 5751243
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:22; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON MICROSCOPY
EQUATIONS
FIELD EQUATIONS
JOSEPHSON JUNCTIONS
JUNCTIONS
MICROSCOPY
NUMERICAL SOLUTION
QUASI PARTICLES
SCANNING ELECTRON MICROSCOPY
SINE-GORDON EQUATION
SOLITONS
SUPERCONDUCTING JUNCTIONS