Self-interaction correction via the momentum distribution
1994
Abstract The self-interaction correction (SIC) to local-spin-density functional theory is important in antiferromagnetic insulators such as transition metal oxides. To understand better the role of SIC in such systems, Svane and Gunnarsson introduced a discrete local-density functional for the Hubbard model. It is shown that their results, and further results, are obtained rather simply by expressing the energy as a functional of the momentum distribution. New results are given for the energy of the two-dimensional Hubbard model. The method is extended to calculate the transverse wave-vector-dependent susceptibility in a simple case.
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