Quantum theory of the dc Josephson effect: Static tunneling characteristic of ultrasmall Josephson junctions

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.26.3698· OSTI ID:6651742

Rogovin, D; Nagel, J

We examine the static tunneling characteristics of ultrasmall Josephson junctions that are current biased on the zero-voltage, dc step. Novel scaling, magnetic, and thermal characteristics are exhibited by the super-current as the device is scaled down from the 1.0 to the 0.01 ..mu..m/sup 2/ regime. Furthermore, the noise voltage is found to peak for devices in which the electrostatic energy required to transfer a pair is equal to the interaction energy between the two superconductors. For such junctions, noise voltages are on the order of several mV, and the magnitude of the supercurrent is found to be a very sensitive function of device area and operating temperature. Furthermore, these features of the junction's dynamics have technological implications regarding digital applications of such devices.

• Research Organization: Rockwell Science Center, 1049 Camino dos Rios, Thousand Oaks, California 91360
• OSTI ID: 6651742
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 26:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
JOSEPHSON JUNCTIONS
JUNCTIONS
NOISE
SIZE
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT