Tunneling. cap alpha. /sup 2/F(. omega. ) from sputtered thin-film NbN
High-quality NbN/oxide/Pb tunnel junctions on sputtered NbN have been fabricated. The 2..delta../k/sub B/T/sub c/ value is 4.25, showing this to be a strong-coupled superconductor. These junctions have satisfactory characteristics for taking derivative measurements. The data were reduced with the use of the modified McMillan-Rowell proximity-gap inversion analysis developed by Arnold and Wolf to generate ..cap alpha../sup 2/F(..omega..) and related microscopic parameters for the first time for a B1 compound. The spectra show two main peaks of comparable strength at about 13 and 47 meV (with a shoulder at about 40 meV). The electron-phonon coupling constant lambda = 1.46 +- 0.10, in reasonable agreement with the strong coupling seen in 2..delta../k/sub B/T/sub c/.
- Research Organization:
- Code 6634, Naval Research Laboratory, Washington, D.C. 20375
- OSTI ID:
- 5651975
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 32:3; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Tunneling. cap alpha. /sup 2/F(. omega. ) as a function of composition in A15 V-Si
Tunneling. cap alpha. /sup 2/F(. omega. ) and heat-capacity measurements in high-T/sub c/ Nb/sub 3/Ge
Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ELEMENTS
FILMS
JUNCTIONS
LEAD
METALS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT