Vortex-antivortex crystals, fractal structures, and orbital glasses in arrays of Josephson junctions
journal contribution
posted on 2015-12-03, 11:35authored byDerek Michael Forrester, K.E. Kuerten, Feodor Kusmartsev
We have found that for large varieties of one-dimensional arrangements of Josephson junctions, such as discrete Josephson transmission lines, stable vortex-anti-vortex structures may be spontaneously created. These highly complex stable, spatial configurations of Josephson vortices and anti-vortices also display fractal features in both the energy spectrum and the spatial ordering of the superconducting phase differences associated with different junctions. These vortex structures are related to an exponential number of local minima that are separated by very large barriers within the highly complex energy landscape. The novel Josephson vortex glass arises without any disorder, whilst the fractal energy spectrum involves weak interactions of Josephson vortices. The Josephson glass and its associated fractal properties may be experimentally detected by measuring the switching current distribution.
Funding
The work has been supported by the Europe
an Science Foundation in the framework of
the network-program “Arrays of Quantum Do
ts and Josephson Junctions” and EPSRC grant
GR/S05052/01
History
School
Aeronautical, Automotive, Chemical and Materials Engineering
Department
Chemical Engineering
Published in
Moldavian Journal of the Physical Sciences
Volume
6
Issue
3
Pages
? - ? (15)
Citation
FORRESTER, D.M., KUERTEN, K.E. and KUSMARTSEV, F.V., 2007. Vortex-antivortex crystals, fractal structures, and orbital glasses in arrays of Josephson junctions. Moldavian Journal of the Physical Sciences, 6 (3).
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