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Difference of Directions Between External Driving Force and MovementDirection of Center of Mass |
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| Authors: | WANG Cang-Long DUAN Wen-Shan CHEN Jian-Min YANG Xiu-Feng |
| Institution: | 1.Department of Physics, Northwest Normal University, Lanzhou 730070, China ;2.State Key Laboratory of Solid Lubrication, Lanzhou institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China |
| Abstract: | Driven dynamics of a two-dimensional Frenkel-Kontorova model is studied in the paper. In our numerical simulations, it is found that the movement direction of the center of mass is not consistent with that of the external driving force except for some special symmetric directions at the lower driving force. Our results also indicate that the movement direction of the center of mass strongly depends on both the magnitude and the direction of the external driving force as well as the misfit angle between two layers. |
| Keywords: | nanotribology Frenkel--Kontorova model superlubricity |
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