Density-gradient-corrected embedded atom method

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dc.creatorWu, Gang
dc.creatorLu, Gang
dc.creatorGarcia-Cervera, Carlos J.
dc.creatorE, Weinan
dc.date2009-01-29
dc.date.accessioned2026-07-07T12:35:33Z
dc.date.available2026-07-07T12:35:33Z
dc.descriptionThrough detailed comparisons between Embedded Atom Method (EAM) and first-principles calculations for Al, we find that EAM tends to fail when there are large electron density gradients present. We attribute the observed failures to the violation of the uniform density approximation (UDA) underlying EAM. To remedy the insufficiency of UDA, we propose a gradient-corrected EAM model which introduces gradient corrections to the embedding function in terms of exchange-correlation and kinetic energies. Based on the perturbation theory of "quasiatoms" and density functional theory, the new embedding function captures the essential physics missing in UDA, and paves the way for developing more transferable EAM potentials. With Voter-Chen EAM potential as an example, we show that the gradient corrections can significantly improve the transferability of the potential.
dc.description8 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0901.4594
dc.identifierhttp://arxiv.org/abs/0901.4594
dc.identifierPhys. Rev. B 79, 035124 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.035124
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217799
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleDensity-gradient-corrected embedded atom method
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