Superconducting materials

Technical Report · Wed Jan 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/5718212· OSTI ID:5718212

Ruvalds, J

Our research on high temperatures superconductors has produced novel insights for the normal state properties of copper oxides that have been discovered in the last few years. Advances in materials preparation have produced singly crystal samples, and sophisticated surface cleavage techniques have unveiled truly metallic behavior in many respects. Thus, the recent confirmation of a Fermi surface in several cuprate superconductors by photoemission spectroscopy has aroused interest in experimental features which heretofore were in apparent contrast to the expectations for a conventional Fermi Liquid. Our group has discovered that nested'' nearly parallel sections of the electron orbits yields an anomalous response which influences the electrical resistivity, optical reflectance, Raman spectrum, and neutron scattering cross section. Our analysis has provided an explanation for seemingly disparate experimental features of high temperature superconductors using consistent values for the electron-electron coupling and the plasma frequency. Our results include the following properties of high temperature superconductors: Nested Fermi Liquid Response in High Temperature Superconductors, Optical Reflectivity and Electron Energy Loss Data, Raman Spectra, Neutron Scattering Cross Section and Scaling, and Prospects for New Superconductors.

• Research Organization: Virginia Univ., Charlottesville, VA (United States). Dept. of Physics
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-84ER45113
• OSTI ID: 5718212
• Report Number(s): DOE/ER/45113-T3; ON: DE92007748
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DOCUMENT TYPES
ELECTRONIC STRUCTURE
FERMI GAS
FLUIDS
GASES
HIGH-TC SUPERCONDUCTORS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROGRESS REPORT
RAMAN SPECTRA
SCATTERING
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES