Electronic structure studies of YBa[sub 2]Cu[sub 3]O[sub x](6. 2 [le] x [le] 6. 9) using angle resolved photoemission

Conference · Sun Nov 01 00:00:00 EST 1992

OSTI ID:6926223

Veal, B W; Liu, Rong; Paulikas, A P; Koelling, D D; Downey, J W ^[1]; Shi, Hao ^[2]; Olson, C G ^[3]; Arko, A J; Joyce, J J; Blythe, R ^[4]

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1. Argonne National Lab., IL (United States)
2. Argonne National Lab., IL (United States) Missouri Univ., Kansas City, MO (United States). Dept. of Physics
3. Ames Lab., IA (United States)
4. Los Alamos National Lab., NM (United States)

Using high resolution angle resolved photoemission, the electronic structure of YBa[sub 2]Cu[sub 3]O[sub x] is examined when oxygen stoichiometries are varied in the range 6.2 [le] [times] [le] 6.9. Detailed measurements of the Fermi surface for YBa[sub 2]Cu[sub 3]O[sub 6.9] are presented and are compared with predictions of band theory. In the metallic region of the phase diagram, changes in the Fermi surfaces are measured as a function of oxygen stoichiometry. The electronic structure is monitored as the oxide changes from a metal to a semiconductor with additional oxygen depletion. For intermediate stoichiometries, effects of oxygen vacancy ordering are considered. Unusual resonant effects observed at several photon energies are examined as oxygen content is varied.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; National Science Foundation (NSF); USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38; W-7405-ENG-82
• OSTI ID: 6926223
• Report Number(s): ANL/MSD/CP-77995; CONF-9206332-1; ON: DE93004811; CNN: DMR 8809854(RL); DMR 8601349
• Resource Relation: Conference: 10. international Summer Institute in Surface Science (ISISS) meeting, Milwaukee, WI (United States), 29 Jun - 2 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
ELECTRONIC STRUCTURE
FERMI LEVEL
ANGULAR CORRELATION
BAND THEORY
BARIUM OXIDES
BRILLOUIN ZONES
COPPER OXIDES
OXYGEN
PHASE TRANSFORMATIONS
PHOTOEMISSION
RESONANCE
STOICHIOMETRY
VACANCIES
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CORRELATIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTS
EMISSION
ENERGY LEVELS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
SECONDARY EMISSION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZONES
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies