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Molecular dynamics simulation of Cun clusters scattering from a single-crystal Cu (111) surface: The influence of surface structure |
| Xianwen Luo(罗先文)1, Meng Wang(王勐)1, Bitao Hu(胡碧涛)2 |
1. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China;
2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China |
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Abstract By performing a molecular dynamics simulation, fragmentation of Cun clusters scattering from a single-crystal Cu (111) surface is studied. The interactions among copper atoms are modeled by tight-binding potential, and the positions of the copper clusters at each time step are calculated by integrating the Newton equations of motion. The percentage of unfragmented clusters depends on the incident velocities, angles of incidence, and surface structure. The influence of surface structure on the fragment distribution is discussed, and the clusters appear to be more stable under an axial channeling condition. The fragment distribution shifting toward the small fragment range for cluster scattering along a random direction is confirmed, indicating that the cluster undergoes more intensive fragmentation.
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Received: 09 August 2015
Revised: 21 September 2015
Accepted manuscript online:
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PACS:
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79.20.Rf
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(Atomic, molecular, and ion beam impact and interactions with surfaces)
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61.85.+p
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(Channeling phenomena (blocking, energy loss, etc.) ?)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11405166). |
Corresponding Authors:
Xianwen Luo
E-mail: 18681630692@163.com
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Cite this article:
Xianwen Luo(罗先文), Meng Wang(王勐), Bitao Hu(胡碧涛) Molecular dynamics simulation of Cun clusters scattering from a single-crystal Cu (111) surface: The influence of surface structure 2016 Chin. Phys. B 25 027901
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