Protocol-dependent shear modulus of amorphous solids
Protocol-dependent shear modulus of amorphous solids
复制标题
无定形固体的协议相关剪切模量
DOI：
10.1088/1742-5468/2016/10/104001
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
F. Zamponi
中科院分区：
文献类型：
--
作者：
Daijyu Nakayama;H. Yoshino;F. Zamponi
我们研究了非晶固体在零温度下对剪切应变的线弹性响应。我们发现响应的特征在于至少两个不同的剪切模量。第一个，μZFC，与单个能量最小值的线性响应相关。第二个，μFC，与通过塑性事件采样不同能量最小值的集合有关。我们提供了允许测量两种剪切模量的协议示例。与基于无限空间维度精确解的理论预测一致，发现μFC/μZFC 比值与干扰转变时压力的平方根成比例消失。我们的结果表明，非晶固体的特点是崎岖的能量景观，这对其弹性响应有深远的影响，正如无限维解所表明的那样。
We investigate the linear elastic response of amorphous solids to a shear strain at zero temperature. We find that the response is characterized by at least two distinct shear moduli. The first one, μZFC, is associated with the linear response of a single energy minimum. The second, μFC, is related to sampling, through plastic events, an ensemble of distinct energy minima. We provide examples of protocols that allow one to measure both shear moduli. In agreement with a theoretical prediction based on the exact solution in infinite spatial dimensions, the ratio μFC/μZFC is found to vanish proportionally to the square root of pressure at the jamming transition. Our results establish that amorphous solids are characterized by a rugged energy landscape, which has a deep impact on their elastic response, as suggested by the infinite-dimensional solution.
影响因子：
56.9
作者：
V. Gates;.. M. L. Ludwig-M.-L.-Ludwig-2273875465;J. A. Hartsuck;T. A. Steitz;H. Muirhead;J. C. Coppola;G. N. Reeke
通讯作者：
V. Gates;.. M. L. Ludwig-M.-L.-Ludwig-2273875465;J. A. Hartsuck;T. A. Steitz;H. Muirhead;J. C. Coppola;G. N. Reeke