Spatially resolved detection of mutually locked Josephson junctions in arrays

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.119516· OSTI ID:531726

Keck, M; Doderer, T; Huebener, R P ^[1]; Traeuble, T; Dolata, R; Weimann, T; Niemeyer, J ^[2]

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1. Physikalisches Institut, Lehrstuhl Experimentalphysik II, Universitaet Tuebingen, Morgenstelle 14, D-72076 Tuebingen (Germany)
2. Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig (Germany)

Mutual locking due to the internal coupling in two-dimensional arrays of Josephson junctions was investigated. The appearance of Shapiro steps in the current versus voltage curve of a coupled on-chip detector junction is used to indicate coherent oscillations in the array. A highly coherent state is observed for some range of the array bias current. By scanning the array with a low-power electron beam, mutually locked junctions remain locked while the unlocked junctions generate a beam-induced additional voltage drop at the array. This imaging technique allows the detection of the nonlocked or weakly locked Josephson junctions in a (partially) locked array state. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 531726
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 71; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COHERENT RADIATION
INTEGRATED CIRCUITS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
MAGNETIC FLUX
RADIATION DETECTION
SUPERCONDUCTIVITY
VOLTAGE DROP