Niobium nitride Josephson tunnel junctions with magnesium oxide barriers

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.95774· OSTI ID:5993658

Shoji, A; Aoyagi, M; Kosaka, S; Shinoki, F; Hayakawa, H

Niobium nitride-niobium nitride Josephson tunnel junctions have been fabricated using amorphous magnesium oxide (a-MgO) films as barriers. These junctions have excellent tunneling characteristics. For example, a large gap voltage (V/sub g/ = 5.1 mV), a large product of the maximum critical current and the normal tunneling resistance (I/sub c/R/sub n/ = 3.25 mV), and a small subgap leakage current (V/sub m/ = 45 mV, measured at 3 mV) have been obtained for a NbN/a-MgO/NbN junction. The critical current of this junction remains finite up to 14.5 K.

• Research Organization: Electrotechnical Laboratory, 1-1-4 Umezono, Sakura-mura, Niihari-gun, Ibaraki 305, Japan
• OSTI ID: 5993658
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 46:11; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CRITICAL CURRENT
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
EXPERIMENTAL DATA
FABRICATION
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAKAGE CURRENT
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT