Superconducting transitions in ultrathin, amorphous, metallic multilayers

Journal Article · Mon Aug 07 04:00:00 EDT 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.63.672· OSTI ID:5948879

Missert, N; Beasley, M R

Multilayers of ultrathin superconducting /ital a/-Mo/sub 79/Ge/sub 21/ and normal Ge-rich /ital a/-Mo/sub 1/minus//ital x//Ge/sub /ital x// were prepared to study the effects of disorder on superconductivity in reduced dimensions. The superconducting transition temperatures of the multilayers as a function of composition and thickness of the normal metal show a systematic enhancement over the single film /ital T//sub /ital c//. This effect can be attributed to a crossover from 2D single-film behavior to 3D bulk behavior as electron diffusion between individual superconducting layers increases. The nature of this crossover sheds light on the microscopic mechanisms reducing /ital T//sub /ital c//.

• Research Organization: Department of Physics, Stanford University, Stanford, California 94305 (US); Department of Applied Physics, Stanford University, Stanford, California 94305
• OSTI ID: 5948879
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 63:6; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
CHEMICAL COMPOSITION
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON DRIFT
ELEMENTS
FILMS
GERMANIUM ALLOYS
LAYERS
METALS
MOLYBDENUM ALLOYS
PHYSICAL PROPERTIES
RANDOMNESS
SUPERCONDUCTIVITY
THICKNESS
THIN FILMS