Abstract
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.
- Received 1 February 2008
DOI:https://doi.org/10.1103/PhysRevB.78.197101
©2008 American Physical Society
