Geometrical Effects in Two-Dimensional Arrays of Josephson Junctions
Abstract
We present an extensive experimental and theoretical study of Josephson-junction arrays with both short- and long-range interaction. We first investigate the effects of current direction on the dynamical properties of rf and dc current-biased overdamped Josephson-junction arrays with short-range interaction in the presence of magnetic flux. We show that if the Lorentz force, produced by the transport current, acting on vortices is directed towards the island barrier, the array will behave like a set of coupled one-dimensional arrays and produce only integer giant Shapiro steps. If, however, the Lorentz force is directed towards any other direction, the array will produce both integer giant and fractional giant Shapiro steps. A moving vortex model and a pendulum model are used to describe our experimental and computational results.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1992
- Accession Number
- ADA252209
Entities
People
- Lydia L Sohn
Organizations
- Harvard University