论文标题
古典玻璃形式中的异常弹性
Anomalous Elasticity in Classical Glass-formers
论文作者
论文摘要
机械菌株下的无定形固体容易发生塑料反应。最近的工作表明，在无定形的颗粒系统中，这些塑料事件通常是四极了，可以筛选弹性响应。当四极的密度很高时，四极场的梯度充当了新兴的偶极源，从而导致机械响应的质量变化，例如在位移场中所见。在本文中，我们研究了古典玻璃板中筛选的效果。这些是由通过二元力相互作用的点粒子制成的。都检查了反功率法和Lennard-Jones相互作用，并且表明在这两种情况下，弹性响应都可以与新理论一致。与经典弹性理论偏离的程度是通过提出的新措施参数化的，该措施被证明对损失对塑料反应的能量的量具有功能依赖性。
Amorphous solids under mechanical strains are prone to plastic responses. Recent work showed that in amorphous granular system these plastic events, that are typically quadrupolar in nature, can screen the elastic response. When the density of the quadrupoles is high, the gradients of the quadrupole field act as emergent dipole sources, leading to qualitative changes in the mechanical response, as seen for example in the displacement field. In this paper we examine the effect of screening in classical glass formers. These are made of point particles that interact via binary forces. Both inverse power law forces and Lennard-Jones interactions are examined, and it is shown that in both cases the elastic response can be strongly screened, in agreement with the novel theory. The degree of deviation from classical elasticity theory is parameterized by a proposed new measure that is shown to have a functional dependence of on the amount of energy lost to plastic responses.
