Comment on "More accurate generalized gradient approximation for solids"

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We point out an issue in the derivation of a nonempirical parameter in the Wu-Cohen exchange functional. With the value of the parameter that yields the correct fourth-order gradient expansion of the functional, the performance of the Wu-Cohen exchange functional is worse than the Perdew-Burke-Ernzerhof functional.

Original languageEnglish (US)
Article number197101
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number19
StatePublished - Nov 19 2008


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