Asymptotic correction schemes for semilocal exchange-correlation functionals
نویسندگان
چکیده
منابع مشابه
Assessment of exchange correlation functionals
We have examined the predictions of many of the generalised gradient approximation, and hybrid functionals, which are presently in the literature. Specifically we have looked at energetics and structures for two molecular sets, one with 93 systems and one with 147 systems. We find that recently developed functionals with more adjustable parameters give improved predictions when compared with le...
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We explore the simplification of widely used meta-generalized-gradient approximation (mGGA) exchangecorrelation functionals to the Laplacian level of refinement by use of approximate kinetic-energy density functionals (KEDFs). Such deorbitalization is motivated by the prospect of reducing computational cost while recovering a strictly Kohn-Sham local potential framework (rather than the usual g...
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c 2006 by John von Neumann Institute for Computing Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise requires prior specific permission by the publisher mentio...
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The construction of density-functional approximations is explored by modeling the adiabatic connection locally, using energy densities defined in terms of the electrostatic potential of the exchange-correlation hole. These local models are more amenable to the construction of size-consistent approximations than their global counterparts. In this work we use accurate input local ingredients to a...
متن کاملCalculation of the lattice constant of solids with semilocal functionals
The exchange-correlation functionals of the generalized gradient approximation GGA are still the most used for the calculations of the geometry and electronic structure of solids. The PBE functional J. P. Perdew et al., Phys. Rev. Lett. 77, 3865 1996 , the most common of them, provides excellent results in many cases. However, very recently other GGA functionals have been proposed and compete i...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2013
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.87.052510