Abstract
The ground-state geometries and energies of Rhn(n=2∼100) clusters are investigated by using Gupta potential combined with the molecular dynamics simu- lated quenching method and the genetic algorithm. Our results show that: As compar- ing the lowest energy structure obtained from the simulated quenching method which can be regardedas the ground-state structure, almost all these ground-state geometries can be found (except Rh50) by using the genetic algorithm for clusters containing 60 or less atoms, but the efficiency of capturing the ground-state geometry decreases obvi- ously with increasing the cluster size. The effective temperature range for obtaining the ground-state energy (geometry) is obtained by systematically analyzing the energy distributions of the simulated quenching structures, and the correlation between the quenching method of finding the ground-state and the cluster size is also investigated further.
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