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A dynamic lattice searching method with rotation operation for optimization of large clusters

by: Xia Wu, Wensheng Cai, Xueguang Shao
Chemical Physics, Vol. 363, No. 1-3. (11 September 2009), pp. 72-77, doi:10.1016/j.chemphys.2009.08.001  Key: citeulike:5432682

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Abstract

Global optimization of large clusters has been a difficult task, though much effort has been paid and many efficient methods have been proposed. During our works, a rotation operation (RO) is designed to realize the structural transformation from decahedra to icosahedra for the optimization of large clusters, by rotating the atoms below the center atom with a definite degree around the fivefold axis. Based on the RO, a development of the previous dynamic lattice searching with constructed core (DLSc), named as DLSc–RO, is presented. With an investigation of the method for the optimization of Lennard-Jones (LJ) clusters, i.e., LJ500, LJ561, LJ600, LJ665–667, LJ670, LJ685, and LJ923, Morse clusters, silver clusters by Gupta potential, and aluminum clusters by NP-B potential, it was found that both the global minima with icosahedral and decahedral motifs can be obtained, and the method is proved to be efficient and universal.


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