Authors: Vitaly V. Chaban
Locating global minimum of certain atomistic ensemble is known to be a highly challenging and resource consuming task. This works represents joint usage of the semi-empirical PM7 Hamiltonian, Broyden–Fletcher–Goldfarb–Shanno algorithm and basin hopping scheme to navigate a potential energy surface. The Au20 nanocluster was used for calibration as its global minimum structure is well-known. Furthermore, Au18Ag2 and Au15Ag5 were simulated for illustration of the algorithm performance. The work shows encouraging results and, particularly, underlines proper accuracy of PM7 as applied to this type of heavy metal systems. The reported results motivate to use the benchmarked method for studying potential energy surfaces of manifold systems and locate their global-minimum atomistic configurations.
Comments: 15 Pages.
[v1] 2015-12-11 04:59:13
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