Electronic structure studies of YBa{sub 2}Cu{sub 3}O{sub x}(6.2 {le} x {le} 6.9) using angle resolved photoemission
- Argonne National Lab., IL (United States)
- Ames Lab., IA (United States)
- 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, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38; W-7405-ENG-82
- OSTI ID:
- 10116645
- Report Number(s):
- ANL/MSD/CP-77995; CONF-9206332-1; ON: DE93004811; CNN: Contract DMR 8809854(RL); Contract DMR 8601349
- Resource Relation:
- Conference: 10. international Summer Institute in Surface Science (ISISS) meeting,Milwaukee, WI (United States),29 Jun - 2 Jul 1992; Other Information: PBD: Nov 1992
- Country of Publication:
- United States
- Language:
- English
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