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- W2106322264 endingPage "50" @default.
- W2106322264 startingPage "31" @default.
- W2106322264 abstract "The concept of orbital- and eigenvalue-dependent exchange-correlation (xc) energy functionals is reviewed. We show how such functionals can be derived in a systematic fashion via a perturbation expansion, utilizing the Kohn–Sham system as a noninteracting reference system. We demonstrate that the second-order contribution to this expansion of the xc-energy functional includes the leading term of the van der Waals interaction. The optimized-potential method (OPM), which allows the calculation of the multiplicative xc-potential corresponding to an orbital- and eigenvalue-dependent xc-energy functional via an integral equation, is discussed in detail. We examine an approximate analytical solution of the OPM integral equation, pointing out that, for eigenvalue-dependent functionals, the three paths used in the literature for the derivation of this approximation yield different results. Finally, a number of illustrative results, both for the exchange-only limit and for the combination of the exact exchange with various correlation functionals, are given. © 1999 John Wiley & Sons, Inc. J Comput Chem 20: 31–50, 1999" @default.
- W2106322264 created "2016-06-24" @default.
- W2106322264 creator A5001866167 @default.
- W2106322264 creator A5071678217 @default.
- W2106322264 date "1999-01-15" @default.
- W2106322264 modified "2023-10-16" @default.
- W2106322264 title "From explicit to implicit density functionals" @default.
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