On the accuracy of the total energy pseudopotential scheme applied to small molecules

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Title:	On the accuracy of the total energy pseudopotential scheme applied to small molecules
Authors:	Milman, V.;李明憲;Lee, M. H.
Contributors:	淡江大學物理學系
Date:	1996-04-11
Issue Date:	2009-12-31 10:29:00 (UTC+8)
Publisher:	American Chemical Society (ACS)
Abstract:	The accuracy of the calculation of the equilibrium geometry of small molecules using the pseudopotential solid state code CASTEP is analyzed. The results of the density functional calculations are presented for alkaline earth dihalides and for the metal−organic molecule Ba(C5H5)2. The density functional theory predicts qualitatively correct geometry in all cases where the accuracy of 0.01 eV in total energy is sufficient to distinguish between different local extrema. CASTEP implementation of the gradient-corrected exchange-correlation functional is shown to be in all cases superior to the local density approximation approach.
Relation:	Journal of Physical Chemistry 100(15), pp.6093-6096
DOI:	10.1021/jp952664e
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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