Anisotropic character of atoms in a two-dimensional Frenkel-Kontorova model

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...

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Published inChinese physics B Vol. 20; no. 1; pp. 426 - 434
Main Author 王苍龙 段文山 陈建敏 石玉仁
Format Journal Article
LanguageEnglish
Published IOP Publishing 2011
Subjects
原子运动
各向异性
弗兰克
摩擦学行为
正方晶格
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/1/014601

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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.
AbstractList 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.
Author 王苍龙 段文山 陈建敏 石玉仁
AuthorAffiliation 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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11-5639/O4
nanotribology, Prenkel-Kontorova model, phase transitions
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Snippet 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...
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SubjectTerms 原子运动
各向异性
弗兰克
摩擦学行为
正方晶格
Title Anisotropic character of atoms in a two-dimensional Frenkel-Kontorova model
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