Electronic correlations and satellites in superconducting oxides

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.8691· OSTI ID:7015509

Chang, K J; Cohen, M L; Penn, D R

The satellite observed at binding energy of 12--13 eV below the Fermi level in the high-T/sub c/ oxide superconductors La/sub 2-//sub x/Sr/sub x/CuO/sub 4/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ is viewed as originating from a state with two holes bound at the same Cu site. As in the case of Ni metal, the satellite is caused by an intra-d-shell shakeup process into a Cu 3d/sup 8/ final state and its intensity is enhanced at resonance because of a super-Koster-Kronig transition. Based on the t-matrix approach for the hole self-energy, we study the effect of electronic correlations on the one-electron band structure. We examine the position of the satellite and find a large Coulomb interaction energy of approx.5 eV at the Cu site when the experimental satellite position is duplicated by the theory. Since this energy is comparable with the 3d bandwidth, the two-hole bound state is a high-energy excitation. This indicates that in the ground state a creation of two holes at the Cu site is unlikely and thus holes are formed at the O sites when Sr is substituted for La in La/sub 2/CuO/sub 4/ and when the oxidation is increased in YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/.

• Research Organization: Xerox Corporation, Palo Alto Research Center, 3333 Coyote Hill Road, Palo Alto, California 94304
• OSTI ID: 7015509
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:13; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
AUGER EFFECT
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COSTER-KRONIG TRANSITIONS
COULOMB FIELD
CRYSTAL MODELS
ELECTRIC FIELDS
ELECTRONIC STRUCTURE
ENERGY-LEVEL TRANSITIONS
HAMILTONIANS
HEISENBERG MODEL
HOLES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VALENCE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES