论文标题
二维液体灰尘等离子体的振荡样在具有变化宽度的一维周期底物上
Oscillation-like diffusion of two-dimensional liquid dusty plasmas on one-dimensional periodic substrates with varied widths
论文作者
论文摘要
使用langevin动力学模拟研究了二维尘土等离子体在具有变化宽度的一维周期底物上的长时间扩散。当底物狭窄并且灰尘颗粒形成单行时，扩散是两个方向上最小的。我们发现，随着底物宽度逐渐增加到其初始值的两倍，二维尘土等离子体的长时间扩散首先增加，然后减少，最后再次增加，从而使底座的底物宽度变化。当宽度增加到特定值时，每个电势井中的尘埃颗粒以稳定的曲折图案排列，大大减少了扩散，并导致观察到的振荡随着宽度的增加而扩散。另外，长期振荡样扩散与跨基板潜在孔中跳的灰尘颗粒的数量一致。
The long-time diffusion of two-dimensional dusty plasmas on a one-dimensional periodic substrate with varied widths is investigated using Langevin dynamical simulations. When the substrate is narrow and the dust particles form a single row, the diffusion is the smallest in both directions. We find that as the substrate width gradually increases to twice its initial value, the long-time diffusion of the two-dimensional dusty plasmas first increases, then decreases, and finally increases again, giving an oscillation-like diffusion with varied substrate width. When the width increases to a specific value, the dust particles within each potential well arrange themselves in a stable zigzag pattern, greatly reducing the diffusion, and leading to the observed oscillation in the diffusion with the increasing width. In addition, the long-time oscillation-like diffusion is consistent with the number of dust particles that are hopping across the potential wells of the substrate.
