Accession Number : ADA096999


Title :   Correlation and Collective Modes in Narrow Band Materials: NiO and FeO.


Descriptive Note : Interim rept. 1 Oct 79-30 Sep 80,


Corporate Author : GEORGIA INST OF TECH ATLANTA SCHOOL OF PHYSICS


Personal Author(s) : Ribarsky,Martin W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a096999.pdf


Report Date : 01 Feb 1981


Pagination or Media Count : 29


Abstract : A procedure has been developed for studying the effects of electronic correlation on the band structures of narrow band materials. This procedure is being applied to TiO, FeO and NiO. The procedure will also be useful for studying the plasmon structure in the presence of a strong lattice potential and the response of electrons in the material to an optical or electronic probe. The experimental electronic loss structures for bulk and oxidized transition metals is analyzed in terms of this model. The effects on superconductivity of the dynamical response of electrons and especially coupling via plasmons or excitons is being studied for Cu2O. It is shown that there may be a connection between experiments on copper oxides which show nearly complete shielding of electric fields and experiments which show excitons in the oxide may obey Bose-Einstein statistics. More careful calculations for this and other transition metal oxides are discussed. (Author)


Descriptors :   *EXCITATION , *OXIDES , *VALENCE BANDS , *ELECTRONIC STATES , *IRON OXIDES , *TITANIUM OXIDES , *NICKEL COMPOUNDS , COUPLING(INTERACTION) , OPTICAL PROPERTIES , SURFACE PROPERTIES , MATHEMATICAL ANALYSIS , LATTICE DYNAMICS , CORRELATION TECHNIQUES , ENERGY BANDS , PLASMONS , BAND SPECTRA , NARROWBAND , SUPERCONDUCTIVITY , EXCITONS , MOLECULAR ORBITALS


Subject Categories : Inorganic Chemistry
      Statistics and Probability
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE