Single Cooper-pair tunneling in small-capacitance junctions

Journal Article · Mon Jul 16 00:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.377· OSTI ID:6705809

Geerligs, L J; Anderegg, V F; Romijn, J; Mooij, J E ^[1]

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1. Department of Applied Physics, Delft University of Technology, P.O. Box 5046, 2600 GA Delft (The Netherlands)

We present observations of charging effects for Cooper pairs in short linear arrays of small-capacitance Josephson junctions. Current-voltage characteristics show a Coulomb gap for Cooper-pair tunneling when the charging energy exceeds the Josephson coupling energy. In a double junction a zero-voltage current is observed that is modulated by a gate voltage applied to the metal island between the junctions. For longer arrays a crossover from Coulomb blockade of Cooper-pair tunneling to a supercurrent is observed when the ratio of Josephson coupling to charging energy is increased.

• OSTI ID: 6705809
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:3; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAPACITANCE
COOPER PAIRS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
NUMERICAL DATA
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT
ULTRALOW TEMPERATURE