Theory of quantum conduction of supercurrent through a constriction

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.67.132· OSTI ID:5755692

Furusaki, A; Takayanagi, H; Tsukada, M ^[1]

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1. Department of Physics, University of Tokyo, Tokyo 113, Japan (JP) Nippon Telegraph and Telephone Corporation Basic Research Laboratories, Musashino-shi, Tokyo 180, Japan

The dc Josephson current through a constriction in a two-dimensional superconductor-semiconductor-superconductor junction is calculated. It is shown that when the Fermi wavelength is comparable with the width of the constriction, the critical current shows a steplike variation as a function of the width of the constriction; this is reminiscent of the quantization of the normal-state conductance of point contacts in a two-dimensional electron gas.

• OSTI ID: 5755692
• Journal Information: Physical Review Letters; (USA), Vol. 67:1; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTING JUNCTIONS
JOSEPHSON EFFECT
CARRIER DENSITY
COOPER PAIRS
CRITICAL CURRENT
TRANSISTORS
TWO-DIMENSIONAL CALCULATIONS
CURRENTS
ELECTRIC CURRENTS
JUNCTIONS
SEMICONDUCTOR DEVICES
656100* - Condensed Matter Physics- Superconductivity