Long Josephson tunnel junctions with doubly connected electrodes

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Documents

DOI

  • Author: Monaco, R., Italy

    Facoltà di Scienze, Università di Salerno, Italy

  • Author: Mygind, J.

    Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kongens Lyngby, Denmark

  • Author: Koshelets, V. P., Russian Federation

    Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Science, Russian Federation

View graph of relations

In order to mimic the phase changes in the primordial Big Bang, several cosmological solid-state experiments have been conceived, during the last decade, to investigate the spontaneous symmetry breaking in superconductors and superfluids cooled through their transition temperature. In one of such experiments, the number of magnetic flux quanta spontaneously trapped in a superconducting loop was measured by means of a long Josephson tunnel junction built on top of the loop itself. We have analyzed this system and found a number of interesting features not occurring in the conventional case with simply connected electrodes. In particular, the fluxoid quantization results in a frustration of the Josephson phase, which, in turn, reduces the junction critical current. Further, the possible stable states of the system are obtained by a self-consistent application of the principle of minimum energy. The theoretical findings are supported by measurements on a number of samples having different geometrical configuration. The experiments demonstrate that a very large signal-to-noise ratio can be achieved in the flux quanta detection.
Original languageEnglish
JournalPhysical Review B (Condensed Matter and Materials Physics)
Publication date2012
Volume85
Journal number9
Pages094514
ISSN1098-0121
DOIs
StatePublished

Bibliographical note

©2012 American Physical Society

CitationsWeb of Science® Times Cited: 4
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

Download statistics

No data available

ID: 9656133