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- W1965156930 abstract "The embedded atom method (EAM) potentials are probably the most widely used interatomic potentials for metals and alloys. However, the EAM potentials impose three constraints on elastic constants that are inconsistent with experiments. At a more subtle (but more important) level, the EAM potentials often incorrectly describe the outward/inward relaxation of surface layers, and therefore will not reliably describe nanostructures. This paper reports a response EAM (R-EAM) that addresses both issues. Conceptually, the electron distribution from each atom does not respond to the atom's environment within the EAM. In reality, the electron distribution from each atom depends on the atom's environment, and this dependence is explicitly incorporated in the R-EAM. Analytical derivation shows that the R-EAM potentials do not impose these three constraints on elastic constants that EAM potentials do. Furthermore, taking hexagonal close packed (hcp) metals Ti, Mg, and Zn as the prototypes, the authors show that the R-EAM potentials correctly describe surfaces---in terms of interlayer spacing and surface reconstruction, in agreement with quantum mechanics calculations, while EAM potentials are not in agreement. In comparison to EAM potentials, the R-EAM potentials require only less than twice the computational power." @default.
- W1965156930 created "2016-06-24" @default.
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- W1965156930 date "2013-01-30" @default.
- W1965156930 modified "2023-10-18" @default.
- W1965156930 title "Response embedded atom method of interatomic potentials" @default.
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- W1965156930 doi "https://doi.org/10.1103/physrevb.87.045431" @default.
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