Optical Excitations in Insulating CuO{sub 4} Plaquette Networks: Discussion Based on a One Dimensional Mott Insulator Sr{sub 2}CuO{sub 3}

Journal Article · Thu Aug 20 00:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3225480· OSTI ID:21344504

Kim, Kyungwan ^[1]

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1. Department of Physics, University of Fribourg, Chemin du Musee 3, CH-1700 Fribourg (Switzerland)

Insulating cuprates become insulator thanks to the strong Coulomb repulsion at Cu d orbitals. They have charge gap between filled oxygen 2p and empty Cu 3d states categorized as charge transfer insulators. Although only Cu 3d and O 2p states are involved in low energy optical transitions, optical excitation spectra of insulating cuprates show rich structures depending on the form of CuO{sub 4} networks. One dimensional chain systems with corner-sharing plaquettes and edge-sharing plaquettes provide basic characters of these transitions. Comparison of available spectra of two dimensional cuprates with one dimensional chain compound Sr{sub 2}CuO{sub 3} suggests that excitonic effect is important in CuO{sub 2} planes.

• OSTI ID: 21344504
• Journal Information: AIP Conference Proceedings, Vol. 1162, Issue 1; Conference: 13. training course in the physics of strongly correlated systems, Salerno (Italy), 6-17 Oct 2008; Other Information: DOI: 10.1063/1.3225480; (c) 2009 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ABSORPTION SPECTRA
CHARGE EXCHANGE
COMPARATIVE EVALUATIONS
COPPER OXIDES
COULOMB FIELD
CUPRATES
D STATES
DIELECTRIC MATERIALS
ENERGY GAP
EXCITATION
EXCITONS
HUBBARD MODEL
OXYGEN
STRONTIUM COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL MODELS
ELECTRIC FIELDS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVALUATION
MATERIALS
MATHEMATICAL MODELS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
QUASI PARTICLES
SPECTRA
TRANSITION ELEMENT COMPOUNDS