期刊
PHYSICAL REVIEW B
卷 78, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.197101
关键词
exchange interactions (electron); gradient methods
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.
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