| Anisotropic character of atoms in a two-dimensional Frenkel–Kontorova model |
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| 引用本文： | 王苍龙,段文山,陈建敏,石玉仁.Anisotropic character of atoms in a two-dimensional Frenkel–Kontorova model[J].中国物理 B,2011,20(1):14601-014601. |
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| 作者姓名： | 王苍龙 段文山 陈建敏 石玉仁 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 10875098), the Natural Science Foundation of Northwest Normal University, China (Grant Nos. NWNU-KJCXGC-03-48 and NWNU-KJCXGC-03-17), and the Domestic Visiting Scholars Program of the Doctoral Candidates of Northwest Normal University, China. |
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| 摘 要： | The dynamics of a certain density of interacting atoms arranged on a two-dimensional square lattice, which is made to slide over a two-dimensional periodic substrate potential with also the quare lattice symmetry, in the presence of dissipation, by an externally applied driving force, is studied. By rotating the misfit angle θ, the dynamical behaviour displays two different tribological regimes: one is smooth, the other becomes intermittent. We comment both on the nature of the atomic dynamics in the locked-to-sliding transition, and on the dynamical states displayed during the atom motion at different values of the driving force. In tribological applications, we also investigate how the main model parameters such as the stiffness strength and the magnitude of the adhesive force affect the static friction of the system. In particular, our simulation indicates that the superlubricity will appear.
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| 关 键 词： | nanotribology Frenkel--Kontorova model phase transitions |
| 收稿时间： | 5/3/2010 12:00:00 AM |
| 修稿时间： | 9/2/2010 12:00:00 AM |
Anisotropic character of atoms in a two-dimensional Frenkel–Kontorova model |
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| Wang Cang-Long,Duan Wen-Shan,Chen Jian-Min and Shi Yu-Ren.Anisotropic character of atoms in a two-dimensional Frenkel–Kontorova model[J].Chinese Physics B,2011,20(1):14601-014601. |
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| Authors: | Wang Cang-Long Duan Wen-Shan Chen Jian-Min and Shi Yu-Ren |
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| Institution: | College of Physics and Electronic Engineering, Northwest Normal University, and Laboratory of Atomic and Molecular Physics in Lanzhou, Lanzhou 730070, China; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | The dynamics of a certain density of interacting atoms arranged on a two-dimensional square lattice, which is made to slide over a two-dimensional periodic substrate potential with also the quare lattice symmetry, in the presence of dissipation, by an externally applied driving force, is studied. By rotating the misfit angle θ, the dynamical behaviour displays two different tribological regimes: one is smooth, the other becomes intermittent. We comment both on the nature of the atomic dynamics in the locked-to-sliding transition, and on the dynamical states displayed during the atom motion at different values of the driving force. In tribological applications, we also investigate how the main model parameters such as the stiffness strength and the magnitude of the adhesive force affect the static friction of the system. In particular, our simulation indicates that the superlubricity will appear. |
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| Keywords: | nanotribology Frenkel--Kontorova model phase transitions |
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