Electronic states in oxide superconductors

Journal Article · Wed May 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.10264· OSTI ID:5794801

Matsumoto, H; Sasaki, M; Tachiki, M ^[1]

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1. Institute for Materials Research, Tohoku University, Sendai 980, Japan (JP)

Electronic states near the metal-insulator transition in oxide superconductors are studied in the {ital p}-{ital d} mixing model by use of the Green's-function method. Due to spin and charge fluctuations induced in the {ital p}-{ital d} hopping, electronic states near the Fermi level are strongly renormalized and show anomalous behavior in the insulator-to-metal transition; that is, the occupied {ital p} band has a tail structure at the top of the band and with hole doping, an additional narrow band develops at the Fermi level inside the charge-transfer gap, splitting from the main {ital p} band. The main {ital p} band gradually approaches the Fermi level with hole doping. The results seem to explain qualitative behaviors of experiments in photoemission and optical conductivity.

• OSTI ID: 5794801
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:13; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
CHARGE EXCHANGE
COPPER COMPOUNDS
CUPRATES
ELECTRONIC STRUCTURE
EMISSION
ENERGY LEVELS
FERMI LEVEL
FLUCTUATIONS
FUNCTIONS
GREEN FUNCTION
HIGH-TC SUPERCONDUCTORS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHASE TRANSFORMATIONS
PHOTOEMISSION
PHYSICAL PROPERTIES
SECONDARY EMISSION
SPIN
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS