Absorption and photoinduced-absorption spectroscopy in superconducting YBa2Cu3O6+X. (Reannouncement with new availability information). Technical report, 1 January-31 October 1991

Technical Report · Fri Aug 09 04:00:00 EDT 1991

OSTI ID:91427

Leng, J M; Ginder, J M; Farneth, W E; Shah, S I; Epstein, A J

Since the discovery of high-temperature superconductors of La(2-x)Sr(x)CuO4-delta and YBa2Cu3O(6+x), a variety of optical studies on the electronic structure have been made to provide a fundamental understanding of the mechanism responsible for high-temperature superconductivity and the insulator-to-metal transitions that occur in these systems upon Sr (or Ba) and oxygen doping, respectively. To date, the mechanism of pairing in the high-Tc materials is still unclear. Band-structure calculations based on a single-electron approximation show that the valence bands of superconducting La2CuO4 and YBa2Cu3O6 are half-filled and fail to describe these materials as antiferromagnetic insulators, indicating the importance of strong electron-electron correlation effects in these materials.

• Research Organization: Pennsylvania Univ., Philadelphia, PA (United States). Dept. of Chemistry
• OSTI ID: 91427
• Report Number(s): AD-A--239425/2/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
BAND THEORY
BARIUM OXIDES
COPPER OXIDES
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
STRONTIUM OXIDES
YTTRIUM OXIDES