Superconducting tunneling on NbN thin films

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00685125· OSTI ID:7152014

Chen, L; Green, S M; Luo, H L

Superconducting tunnel junctions were fabricated on reactively sputtered NbN thin films. The NbN films were homogeneous and of single cubic phase; their transition temperatures were relatively high (14.0-17.3 K). Native oxide barriers and gold counter electrodes completed the junctions. Results of dV/dI versus V measurements located the maximum energy gap near 3.30 meV, yielding a strong coupling parameter of above 4.5. Acoustic phonons were clearly observed in d/sup 2/I/dV/sup 2/ versus V measurements at around 22.5 and 27.5 meV.

• Research Organization: Univ. of California at San Diego, La Volla, CA
• OSTI ID: 7152014
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 64:3/4; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELECTRON-PHONON COUPLING
ENERGY GAP
FILMS
JUNCTIONS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
REFRACTORY METAL COMPOUNDS
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TUNNEL EFFECT