Abstract
The effect of Coulomb correlations on the electronic structure of Cu-oxide superconductors are determined with the many-body corrections to the known band structure made by calculating perturbatively the self-energy due to the on-site Coulomb interaction at the Cu sites. The effective mass enhancement at EF, renormalized band dispersions, and the energy dependence of the band state broadening for Nd2-xCexCuO4 are predicted and found to be in agreement with observations in other Cu-oxide superconductors with a choice of the effective Coulomb interaction parameter U=3 eV.
Original language | English (US) |
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Pages (from-to) | 274-284 |
Number of pages | 11 |
Journal | Physica C: Superconductivity and its applications |
Volume | 173 |
Issue number | 3-4 |
DOIs | |
State | Published - Feb 1 1991 |
Funding
We thank D.D. Koelling and M. Norman for helpful discussions and J.C. Campuzano for making his results available prior to publication. We are also grateful to S.-J. Oh for discussions and D.W. Lynch, A. Virosztek and J. Ruvalds for preprints of their work. Work supported by the National Science Foundation (DMR88-16 126) through the North-western University Materials Research Center and a computing grant from its Division of Advanced Scientific Computing at the National Center for Supercomputer Applications at the University of Illinois, Urbana/Champaign and by a computing grant at the NASA Ames Supercomputing Center.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering