Journal of Physics Condensed Matter · 1990 · 113 citations · 9 references
Natural SciencesPhysicsCondensed Matter PhysicsQuantum MechanicsDensity Functional TheoryDensity Matrix FormalismDielectric PropertiesDielectricsElectronic StructureStrongly Correlated Electron SystemsDensity MatricesDensity Of StatesDielectric ScreeningElectronic Density Of StatesEnergy EigenstatesExchange-correlation FunctionalsScreening Matrix
The author shows that the energy functional defined by Harris has a local maximum at the exact ground-state density of an electronic system provided the dielectric screening matrix of the system has eigenvalues that are all greater than unity.
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Self-Consistent Equations Including Exchange and Correlation Effects
W. Kohn, L. J. Sham · Physical Review · 1965 · 63.2K citations · Full text