Predicting fundamental gaps accurately from density functional theory with non-empirical local range separation
Moritz Brütting,
Hilke Bahmann,
Stephan Kümmel
Abstract:We present an exchange–correlation approximation in which the Coulomb interaction is split into long- and short-range components and the range separation is determined by a non-empirical density functional. The functional respects important constraints, such as the homogeneous and slowly varying density limits, leads to the correct long-range potential, and eliminates one-electron self-interaction. Our approach is designed for spectroscopic purposes and closely approximates the piecewise linearity of the energ… Show more
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