Layered ultrathin coherent structure

Conference · Sat Dec 15 04:00:00 EST 1979 · AIP Conf. Proc.; (United States)

OSTI ID:5600866

Schuller, I K; Falco, C M

We describe a new class of superconducting materials, layered Ultrathin Coherent Structures (LUCS). These materials are produced by sequentially depositing ultrathin layers of materials using high rate magnetron sputtering or thermal evaporation. We present strong evidence that layers as thin as 10 A can be prepared in this fashion. Resistivity data indicates that the mean free path is layer thickness limited. A strong disagreement is found between the experimentally measured transition temperatures T/sub c/ and the T/sub c/'s calculated using the Cooper limit approximation. This is interpreted as a change in the band structure or the phonon structure of the material due to layering or to surfaces.

• Research Organization: Solid State Science Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5600866
• Report Number(s): CONF-791151-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 58:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BAND THEORY
COPPER
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EVAPORATION
FILMS
LAYERS
METALS
NIOBIUM
PHASE TRANSFORMATIONS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
REFRACTORY METALS
SPUTTERING
SUPERCONDUCTING FILMS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE