Germanium-overcoated niobium Dayem bridges
Overcoating constriction microbridges with semiconducting germanium provides additional thermal conductivity at liquid-helium temperatures to reduce the effects of self-heating in these Josephson junctions. Microwave-induced steps were observed in the I-V characteristics of an overcoated Dayem bridge fabricated in a 15-nm-thick niobium film; at 4.2 K (T/sub c/-T=2.6 K), at least 20 steps could be counted. No steps were observed in the I-V characteristics of the bridge prior to overcoating. In addition, the germanium overcoat can protect against electrical disturbances at room temperature. (AIP)
- Research Organization:
- Space Sciences Laboratory, George C. Marshall Space Flight Center, Huntsville, Alabama 35812
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-029011
- OSTI ID:
- 4046385
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 28; ISSN APPLAB; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Frequency dependence of the ac Josephson effect in small Dayem bridges
Observation of the Josephson effect in Nb$sub 3$Ge Dayem bridges
Observation of the Josephson effect in Nb/sub 3/Ge Dayem bridges
Journal Article
·
Mon Aug 09 00:00:00 EDT 1976
· Phys. Rev. Lett.; (United States)
·
OSTI ID:7345366
Observation of the Josephson effect in Nb$sub 3$Ge Dayem bridges
Conference
·
Sat Mar 01 00:00:00 EDT 1975
· IEEE Trans. Magn., v. MAG-11, no. 2, pp. 880-882
·
OSTI ID:4094443
Observation of the Josephson effect in Nb/sub 3/Ge Dayem bridges
Conference
·
Sat Mar 01 00:00:00 EDT 1975
· IEEE Trans. Magn.; (United States)
·
OSTI ID:7367610
Related Subjects
*ELECTRIC BRIDGES-- JOSEPHSON JUNCTIONS
*JOSEPHSON JUNCTIONS-- ELECTRIC BRIDGES
420201* --Engineering--Facilities & Equipment--Cryogenic & Superconducting Equipment & Devices
COATINGS
FILMS
GERMANIUM
N42220* --Engineering--Facilities & Equipment--Cryogenic & Superconducting Equipment & Devices
NIOBIUM
THERMAL CONDUCTIVITY
*JOSEPHSON JUNCTIONS-- ELECTRIC BRIDGES
420201* --Engineering--Facilities & Equipment--Cryogenic & Superconducting Equipment & Devices
COATINGS
FILMS
GERMANIUM
N42220* --Engineering--Facilities & Equipment--Cryogenic & Superconducting Equipment & Devices
NIOBIUM
THERMAL CONDUCTIVITY