Negative Poisson's ratio in puckered two-dimensional materials
Negative Poisson's ratio in puckered two-dimensional materials
复制标题
褶皱二维材料中的负泊松比
DOI：
10.1103/physrevmaterials.3.054002
复制
发表时间：
2019-05-21
影响因子：
3.4
通讯作者：
Quhe, Ruge
中科院分区：
文献类型：
--
作者：
Liu, Bei;Niu, Mengqi;Quhe, Ruge
实验验证的负泊松比的黑磷允许扩展的医疗和国防应用的纳米级制度，没有任何人工工程。与单层黑磷，单层硅，硒化硅，碲化锡，和W-相锑的结构类似，预测显示拉胀行为，而W-相锑不通过使用第一性原理计算。通过将这些系统与其他起皱的二维（2D）材料的集体观点，我们进一步制定了一个统一的机制，可以解释不同类型的平面外泊松比在起皱的2D材料，包括单层V族烯（BP，As和Sb）和IV族单硫族化物（SiS，SiSe，GeS，GeSe，SnS，SnSe和SnTe）。我们发现，无论是结构和组成的褶皱单分子膜发挥重要作用的面外泊松比。
The experimentally verified negative Poisson's ratio of black phosphorus allows the extension of the medical and defense applications to the nanoscale regime without any artificial engineering. With a structure analogous to monolayer black phosphorus, monolayer SiS, SiSe, SnTe, and W-phase antimonene are predicted to show auxetic behavior, while a W-phase antimonene does not by using first-principles calculations. By putting these systems into a collective perspective with other puckered two-dimensional (2D) materials, we further formulate a uniform mechanism that could explain the different types of out-of-plane Poisson's ratio in the puckered 2D materials including monolayer group V-enes (BP, As, and Sb) and group IV monochalcogenides (SiS, SiSe, GeS, GeSe, SnS, SnSe, and SnTe). We found that both the structure and composition of the puckered monolayers play important roles in the out-of-plane Poisson's ratio.