ELASTIC DEFORMATIONS IN COVALENT AMORPHOUS SOLIDS
ELASTIC DEFORMATIONS IN COVALENT AMORPHOUS SOLIDS
复制标题
共价非晶固体的弹性变形
DOI：
10.1142/s0217984913300020
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发表时间：
2013
影响因子：
1.9
通讯作者：
A. Zaccone
中科院分区：
文献类型：
--
作者：
A. Zaccone
结构无序对固体的力学响应和稳定性有显著影响。一方面，刚性渗流表明，机械稳定性的极限与松弛模式的出现相一致。另一方面，非仿射原子位移也会降低固体的刚性，即由应变所决定的仿射位移之上的无序引起的额外运动。这两个框架提供了不同的描述无序固体的弹性与中心力键，但刚性渗透和nonaffinity之间的关系仍然不清楚。因此，真实的材料，即那些具有共价（非中心）键的材料，如非晶半导体，的统一理论一直是难以捉摸的。在简要回顾了这些理论之后，我们提出了一个平均场的论点，试图提供刚性渗透和非亲和性之间的统一联系。这个框架产生的共价无定形固体的剪切模量的分析预测与潜在的应用程序，以无定形半导体和无序碳电子材料。
Structural disorder has a dramatic impact on the mechanical response and stability of solids. On the one hand, rigidity percolation shows that the limit of mechanical stability coincides with the emergence of floppy modes. On the other hand, the rigidity of solids is also lowered by nonaffine atomic displacements, i.e. additional motions caused by the disorder on top of the affine displacements dictated by the strain. These two frameworks have offered alternative descriptions of the elasticity of disordered solids with central-force bonds, but the relationship between rigidity percolation and nonaffinity has remained unclear. As such, a unifying theory of real materials, i.e. those with covalent (noncentral) bonds, such as amorphous semiconductors, has been elusive. After briefly reviewing these theories, we present a mean-field argument which attempts to provide the unifying link between rigidity percolation and non-affinity. This framework yields analytical predictions of the shear modulus of covalent amorphous solids with potential applications to amorphous semiconductors and disordered carbon electronic materials.
影响因子：
8.6
作者：
Huisman, E. M.;Lubensky, T. C.
通讯作者：
Lubensky, T. C.