Photoemission and electronic structure studies of YBa2Cu3Ox

Liu, R.; Veal, B. W.; Paulikas, A. P.; Downey, J. W.; Shi, H.; Olson, C. G.; Gu, C.; Arko, A. J.; Joyce, J. J.; Bartlett, R. J.

doi:10.1016/0022-3697(91)90123-h

Photoemission and electronic structure studies of YBa₂Cu₃O_x

Conference · Fri Aug 30 00:00:00 EDT 2002 · Journal of Physics and Chemistry of Solids

DOI:https://doi.org/10.1016/0022-3697(91)90123-h· OSTI ID:5541789

Liu, R. ^[1]; Veal, B. W. ^[2]; Paulikas, A. P. ^[2]; Downey, J. W. ^[2]; Shi, H. ^[2]; Olson, C. G. ^[3]; Gu, C. ^[3]; Arko, A. J. ^[4]; Joyce, J. J. ^[4]; Bartlett, R. J. ^[4]

Science and Technology Center for Superconductivity (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Ames Lab., and Iowa State Univ., Ames, IA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

High-resolution angle-resolved photoelectron spectroscopy measurements are reported for YBa₂Cu₃O_x when the oxygen stoichiometry x is varied between 6.9 (92 K superconductor) and 6.2 (insulator). Fermi surfaces obtained from energy distribution curve measurements on a grid scanning the entire first Brillouin zone are reported for the x = 6.9 sample. Bands along the Γ-S symmetry line were measured for samples with reduced oxygen stoichiometry. For superconducting samples, these bands are essentially independent of x. As the material becomes insulating (x < 6.4), a dramatic falloff of spectral weight near E_F is observed. Resonant spectral features also disappear. Efforts to observe a superconducting gap are reported.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)

DOE Contract Number:: W-31109-ENG-38; W-7405-ENG-82

OSTI ID:: 5541789

Report Number(s):: ANL/CP--73357; CONF-9103112--2; ON: DE91014469

Journal Information:: Journal of Physics and Chemistry of Solids, Journal Name: Journal of Physics and Chemistry of Solids Journal Issue: 11-12 Vol. 52; ISSN 0022-3697

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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Photoemission and electronic structure studies of YBa2Cu3Ox

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References (31)

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Photoemission and electronic structure studies of YBa₂Cu₃O_x