Odashima and Capelle (OC) recently presented a nonempirical, nonlocal, approximate exchange-correlation density functional constructed from exact exchange and the Lieb-Oxford bound [M. M. Odashima and K. Capelle, Phys. Rev. A 79, 062515 (2009)] https://doi.org/10.1103/PhysRevA.79.062515. Our “Rung 3.5” exchange energy, built from the product of the Kohn-Sham one-particle density matrix and a semilocal model density matrix, provides an upper bound to exact exchange via the Cauchy-Schwarz inequality. The present work combines this bound with the OC construction to yield nonempirical Rung 3.5 functionals. Numerical tests indicate that these functionals provide reasonable treatments of many molecular properties, and suggest areas for improvement. The results illustrate the promise of the OC construction and the utility of Rung 3.5 exchange in constraint satisfaction.
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14 December 2012
Research Article|
December 12 2012
Nonempirical Rung 3.5 density functionals from the Lieb-Oxford bound Available to Purchase
Benjamin G. Janesko
Benjamin G. Janesko
a)
Department of Chemistry,
Texas Christian University
, Fort Worth, Texas 76129, USA
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Benjamin G. Janesko
a)
Department of Chemistry,
Texas Christian University
, Fort Worth, Texas 76129, USA
a)
Electronic mail: [email protected].
J. Chem. Phys. 137, 224110 (2012)
Article history
Received:
September 10 2012
Accepted:
November 14 2012
Citation
Benjamin G. Janesko; Nonempirical Rung 3.5 density functionals from the Lieb-Oxford bound. J. Chem. Phys. 14 December 2012; 137 (22): 224110. https://doi.org/10.1063/1.4769227
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