Optical and electrical properties of thin superconducting films. Final Report, 1 Jun. - 31 Dec. 1990

Technical Report · Sat Dec 01 00:00:00 EST 1990

OSTI ID:5293412

Covington, B C; Jing, F Chen

Infrared spectroscopic techniques can provide a vital probe of the superconducting energy gap which is one of the most fundamental physical properties of superconductors. Currently, the central questions regarding the optical properties of superconductors are how the energy gap can be measured by infrared techniques and at which frequency the gap exists. An effective infrared spectroscopic method to investigate the superconducting energy gap, Eg, was developed by using the Bomem DA 3.01 Fourier Transformation Spectrophotometer. The reflectivity of a superconducting thin film of YBaCuO deposited on SrTiO3 was measured. A shoulder was observed in the superconducting state reflectance R(sub S) at 480/cm. This gives a value of Eg/kT(sub c) = 7.83, where k is the Boltzmann constant and T(sub c) is the superconducting transition temperature, from which, it is suggested that YBaCuO is a very strong coupling superconductor.

• Research Organization: Sam Houston State Univ., Huntsville, TX (United States)
• OSTI ID: 5293412
• Report Number(s): N-91-27956; NASA-CR-188668; NAS-1.26:188668; CNN: NAG5-1347
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ELECTRICAL PROPERTIES
OPTICAL PROPERTIES
BARIUM OXIDES
COPPER OXIDES
FOURIER TRANSFORMATION
SUPERCONDUCTING FILMS
THIN FILMS
TRANSITION TEMPERATURE
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
FILMS
INTEGRAL TRANSFORMATIONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSFORMATIONS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity