Crossover from time-correlated single-electron tunneling to that of Cooper pairs

Bylander, J., Duty, T., Johansson, G. and Delsing, P. (2007) Crossover from time-correlated single-electron tunneling to that of Cooper pairs. Physical Review B, 76 2: 020506-1-020506-4. doi:10.1103/PhysRevB.76.020506

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Author Bylander, J.
Duty, T.
Johansson, G.
Delsing, P.
Title Crossover from time-correlated single-electron tunneling to that of Cooper pairs
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
1550-235X
Publication date 2007
Sub-type Article (original research)
DOI 10.1103/PhysRevB.76.020506
Open Access Status File (Publisher version)
Volume 76
Issue 2
Start page 020506-1
End page 020506-4
Total pages 4
Editor Adams, P. D.
Begley, A. M.
Place of publication Ridge, New York
Publisher The American Physical Society
Language eng
Subject 240000 Physical Sciences
Abstract We have studied charge transport in a one-dimensional chain of small Josephson junctions using a single-electron transistor. We observe a crossover from time-correlated tunneling of single electrons to that of Cooper pairs as a function of both magnetic field and current. At relatively high magnetic field, single-electron transport dominates and the tunneling frequency is given by f=I/e, where I is the current through the chain and e is the electron's charge. As the magnetic field is lowered, the frequency gradually shifts to f=I/2e for I greater than or similar to 200 fA, indicating Cooper-pair transport. For the parameters of the measured sample, we expect the Cooper-pair transport to be incoherent.
Keyword Physics, Condensed Matter
Small Josephson-junctions
One-dimensional Arrays
Coulomb-blockade
Oscillations
Solitons
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
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Created: Mon, 04 Aug 2008, 09:02:22 EST by Thelma Whitbourne on behalf of School of Mathematics & Physics