Directional Mode-Locking of Dynamics of Two-Dimensional Superparamagnetic Colloidal System in a Periodic Pinning Array |
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Authors: | ZHANG Zhe-Fei DONG Yong-Qiang CAO Yi-Gang |
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Institution: | 1.School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;2.Information College of Electronic-Engineering, Xuchang University, Xuchang 310018, China |
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Abstract: | Using Langevin simulations,we study numerically the directional mode-locking of the dynamics of twodimensional superparamagnetic colloidal system in a periodic pinning array.When the colloidal particles are initially commensurate with the pinning sites,there appear mode-locking steps in the average velocity of colloidal particles along certain directions of the external driving force.With an increase in the pinning strength,the width of the step increases linearly but the velocity at the step decreases parabolically. |
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Keywords: | superparamagnetic colloidal particle Langevin simulation directional mode-locking |
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