论文标题
由2D周期基板调制的2D Yukawa固体中的定向锁定
Directional Locking in a 2D Yukawa Solid Modulated by a 2D Periodic Substrate
论文作者
论文摘要
使用langevin动力学模拟研究了由2D平方周期基材调制的2D尘土等离子体固体调制的2D尘埃等离子体固体调制的方向繁殖动力学。当外部驱动力的方向相对于基础平方基板而变化时，我们会观察到明显的方向锁定效果。当驱动力的方向接近基板的对称方向时，这些锁定步骤就会出现，这对应于不同的动态流动模式和结构。在相邻锁定步骤之间的条件下，观察到移动有序状态。尽管不连续的过渡通常发生在锁定步骤和非锁定部分之间，但在与无序塑料流相关的锁定步骤附近也发现了连续的过渡。我们的结果表明，引导不足的系统也会发生定向锁定，可以在2D底物调制的尘土质等离子体中对其进行实验测试。
Directional depinning dynamics of a 2D dusty plasma solid modulated by a 2D square periodic substrate are investigated using Langevin dynamical simulations. We observe prominent directional locking effects when the direction of the external driving force is varied relative to the underlying square substrate. These locking steps appear when the direction of the driving force is close to the symmetry direction of the substrate, corresponding to the different dynamical flow patterns and the structures. In the conditions between the adjacent locking steps, moving ordered states are observed. Although the discontinuous transitions often occur between the locking steps and the non-locking portion, the continuous transitions are also found around the locking step associated with the disordered plastic flow close to its termini. Our results show that directional locking also occurs for underdamped systems, which could be tested experimentally in dusty plasmas modulated by 2D substrates.
