Inequivalence of the physical and Kohn-Sham Fermi surfaces
- 15 September 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (9) , 5906-5912
- https://doi.org/10.1103/physrevb.38.5906
Abstract
The Fermi surface of an infinite system of interacting electrons is a sharply defined ground-state property. An exact solution of the Kohn-Sham equations of density-functional theory, which yields the correct physical density distribution and ground-state energy, also yields a Fermi surface. This paper shows by an example that, in general, the Kohn-Sham Fermi surface does not exactly reproduce the physical one.Keywords
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