Fermi surfaces of YBa sub 2 Cu sub 3 O sub 6. 9 as seen by angle-resolved photoemission

Journal Article · Mon May 07 00:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2308· OSTI ID:7023663

Campuzano, J C; Jennings, G; Faiz, M; Beaulaigue, L; Veal, B W; Liu, J Z; Paulikas, A P; Vandervoort, K; Claus, H ^[1]; List, R S; Arko, A J; Bartlett, R J ^[2]

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1. Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL (USA) University of Illinois at Chicago, Chicago, IL (USA)
2. Los Alamos National Laboratory, Los Alamos, NM (USA)

We have carried out angle-resolved photoemission spectroscopy on single crystals of YBa{sub 2}Cu{sub 3}O{sub 6.9}. The crystals were cleaved {ital in} {ital situ}, under ultrahigh vacuum while the sample stage was cooled to 8 K. By observing the dispersion of the electron energy bands as they cross the Fermi energy, we have mapped the Fermi surfaces. There is reasonable agreement between the experimental results and the predictions of band-structure calculations using the local-density approximation, as well as with positron annihilation experiments. Rather than {delta} holes, these results indicate that the Fermi surface of YBa{sub 2}Cu{sub 3}O{sub 6.9} encloses 1+{delta} holes, where {delta} is the doping level.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7023663
• Journal Information: Physical Review Letters; (USA), Vol. 64:19; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
FERMI LEVEL
COPPER OXIDES
YTTRIUM OXIDES
BINDING ENERGY
CLEAVAGE
COOLING
CORRELATIONS
ELECTRONIC STRUCTURE
EXPERIMENTAL DATA
HIGH-TC SUPERCONDUCTORS
IN-SITU PROCESSING
MAPPING
MONOCRYSTALS
PHOTOEMISSION
SPATIAL RESOLUTION
ULTRAHIGH VACUUM
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
DATA
EMISSION
ENERGY
ENERGY LEVELS
INFORMATION
MICROSTRUCTURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RESOLUTION
SECONDARY EMISSION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity