Optical absorption in the two-dimensional two-band model

Conference · Wed Jun 01 00:00:00 EDT 1994 · Journal of Superconductivity; (United States)

OSTI ID:7243905

Mishima, A ^[1]

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1. Kanazawa Inst. of Technology, Ishikawa (Japan)

The optical properties are studied within the two-dimensional two-band model with the antiferromagnetic exchange interaction between nearest-neighbor d and p spins in the Cu-O sheet. The optical-absorption spectra are computed within the mean-field theory with the periodic boundary condition. An insulating gap of about 1.7 eV appears for nondoping. A Drude peak appears for a single p hole. The Drude peak and the in-gap state appear for two p holes. The intensity of the charge-transfer band decreases, while those of the Drude peak and the in-gap state increase with doping. It turns out that the strong Coulomb repulsion and the d[sub x][sup 2]-y[sup 2] orbital are important such as the p[sub x] or p[sub y] orbital in the electronic properties of high-Tc copper oxides. 10 refs., 2 figs.

• OSTI ID: 7243905
• Report Number(s): CONF-930710-; CODEN: JOUSEH; TRN: 94-016441
• Journal Information: Journal of Superconductivity; (United States), Vol. 7:3; Conference: Physics and chemistry of molecular and oxide superconductors conference, Eugene, OR (United States), 27-31 Jul 1993; ISSN 0896-1107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
HIGH-TC SUPERCONDUCTORS
ABSORPTION SPECTRA
CRYSTAL DOPING
OPTICAL PROPERTIES
BAND THEORY
COULOMB FIELD
CUPRATES
HOLES
MATHEMATICAL MODELS
MEAN-FIELD THEORY
COPPER COMPOUNDS
ELECTRIC FIELDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360204 - Ceramics
Cermets
& Refractories- Physical Properties
990200 - Mathematics & Computers