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Photoemission Spectroscopy of Single Crystal HTSC Materials: A Fermi Liquid Electronic Structure

Published online by Cambridge University Press:  21 February 2011

A. J. Arko ,
R. S. List ,
R. J. Bartlett ,
S. W. Cheong ,
C. G. Olson ,
A. -B. Yang ,
R. Liu ,
C. Gu ,
B. W. Veal  and
J. Z. Liu
...Show all authors
A. J. Arko
Affiliation:
Los Alamos National Laboratory, P-10 Group, Los Alamos, NM, 87545
R. S. List
Affiliation:
Los Alamos National Laboratory, P-10 Group, Los Alamos, NM, 87545
R. J. Bartlett
Affiliation:
Los Alamos National Laboratory, P-10 Group, Los Alamos, NM, 87545
S. W. Cheong
Affiliation:
Los Alamos National Laboratory, P-10 Group, Los Alamos, NM, 87545
C. G. Olson
Affiliation:
Ames National Laboratory- USDOE, Iowa State University, Ames, Iowa 50011
A. -B. Yang
Affiliation:
Ames National Laboratory- USDOE, Iowa State University, Ames, Iowa 50011
R. Liu
Affiliation:
Ames National Laboratory- USDOE, Iowa State University, Ames, Iowa 50011
C. Gu
Affiliation:
Ames National Laboratory- USDOE, Iowa State University, Ames, Iowa 50011
B. W. Veal
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. Z. Liu
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
A. P. Paulikas
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
K. Vandervoort
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
H. Claus
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. C. Campuzano
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Photoemission spectra from HTSC materials ( primarily 123 -type ), cleaved and measured at 20K, reveal a rich DOS structure which compares favorably with a calculated band structure, except for a residual 0.5 eV shift which may reflect some correlation effects. Band dispersion is observed throughout the valence bands, with clear evidence for a 0.2 eV wide band dispersing through EF. The orbital character at EF is a mix of Cu-3d and O-2p. There is unambiguous evidence for a large BCS-like gap (2Δ≥ 4kTc).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 156: Symposium M – High Temperature Superconductors: Relationships Between Properties, Structure, and Solid State Chemistry , 1989 , 159
Copyright
Copyright © Materials Research Society 1989

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References

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