二维尘埃等离子体固体的慢塑性蠕变
Slow plastic creep of 2D dusty plasma solids
摘要：
我们报告复杂的等离子体实验，辅助数值模拟，提供了一个替代的多晶固体物质的宏观响应之间的定性联系小剪切力和潜在的微观过程。在静态蠕变制度，我们已经确定的指数的剪切速率依赖的剪切应力和缺陷密度，分别为$α= 1.15 \pm 0.1$和$β= 2.4 \pm 0.4$。我们发现，位错对的形成和快速滑移运动的晶格是占主导地位的过程。
英文摘要：
We report complex plasma experiments, assisted by numerical simulations, providing an alternative qualitative link between the macroscopic response of polycrystalline solid matter to small shearing forces and the possible underlying microscopic processes. In the stationary creep regime we have determined the exponents of the shear rate dependence of the shear stress and defect density, being $α= 1.15 \pm 0.1$ and $β= 2.4 \pm 0.4$, respectively. We show that the formation and rapid glide motion of dislocation pairs in the lattice are dominant processes.
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