Fermi-surface topology of YBa sub 2 Cu sub 3 O sub x with varied oxygen stoichiometry: A photoemission study

Journal Article · Sat Oct 31 23:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.46.11056· OSTI ID:7048431

Liu, R; Veal, B W; Paulikas, A P; Downey, J W; Kostic, P J; Fleshler, S; Welp, U ^[1]; Olson, C G; Wu, X ^[2]; Arko, A J; Joyce, J J ^[3]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa 50011 (United States)
3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

High-resolution angle-resolved photoemission measurements are reported for YBa{sub 2}Cu{sub 3}O{sub {ital x}} when oxygen stoichiometry {ital x} was varied between 6.3 and 6.9. Fermi surfaces were measured and their dependence on oxygen stoichiometry was monitored by observing the dispersing behavior of spectral features, scanning the entire first Brillouin zone. For {ital x}=6.9, measured Fermi surfaces correspond very well with the plane-related Fermi surfaces calculated from band theory. Relatively small changes in Fermi surfaces were observed when oxygen stoiochiometry was varied in the range 6.5{le}{ital x}{le}6.9, where the material is metallic. However, significant changes in the spectral behavior were observed when the material becomes insulating.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 7048431
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:17; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360607* -- Other Materials-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BAND THEORY
BARIUM COMPOUNDS
BARIUM OXIDES
BRILLOUIN ZONES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
EMISSION
ENERGY LEVELS
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
SECONDARY EMISSION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZONES