Static and dynamical isomerization of Cu38 cluster

The lowest-energy geometrical and electronic structures of Cu 38 cluster are investigated by density-functional calculations combined with a genetic algorithm based on a many body semi-empirical interatomic potential, the traditional FCC-truncated Octahedron (OH) and an incomplete-Mackay icosahedron...

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Bibliographic Details
Published in:Scientific reports 2019-05, Vol.9 (1), p.7564-7564, Article 7564
Main Authors: Zhang, Chuanchuan, Duan, Haiming, Lv, Xin, Cao, Biaobing, Abliz, Ablat, Wu, Zhaofeng, Long, Mengqiu
Format: Article
Language:English
Subjects:
119/118
639/766/119
639/766/36/1124
Energy
Evolution & development
Experiments
Genetic algorithms
Geometry
Humanities and Social Sciences
Ionization
Isomerization
Isomers
multidisciplinary
Photoelectron spectroscopy
Science
Science (multidisciplinary)
Spectrum analysis
Symmetry
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Summary:The lowest-energy geometrical and electronic structures of Cu 38 cluster are investigated by density-functional calculations combined with a genetic algorithm based on a many body semi-empirical interatomic potential, the traditional FCC-truncated Octahedron (OH) and an incomplete-Mackay icosahedron (IMI) are recognized as the two lowest energy structures (energetically degenerate isomers) but with different electronic structures: a semiconductor-type with the energy-gap of 0.356 eV for the IMI and a metallic-type with negligible gap for the OH, which is in good agreement with the experimental results. The electron affinity and ionization potential of Cu 38 are also discussed and compared with the observations of the ultraviolet photoelectron spectroscopy experiments. The dynamical isomerization of the OH-like and IMI-like structures of Cu 38 is revealed to dominate the pre-melting stage through the investigation by the molecular dynamics annealing simulations.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-44055-z