Commensurate-incommensurate phase transition and a network of domain walls in bilayer graphene with a biaxially stretched layer
Commensurate-incommensurate phase transition and a network of domain walls in bilayer graphene with a biaxially stretched layer
复制标题
具有双轴拉伸层的双层石墨烯中的相变-不相变和畴壁网络
作者：
I. Lebedeva;A. Popov
采用双链Frenkel-Kontorova模型对双层石墨烯中畴壁网络的能量和结构进行了解析描述。使用这种方法，被认为是双轴拉伸的石墨烯层之一后的膨胀-无公度相变。我们证明，形成的等边三角形网络的畴壁变得积极有利的临界相对双轴延伸率的底层的3.0\cdot 10^{-3}$以上。结果表明，只要畴壁三角形网络的最佳周期远大于畴壁的宽度，它与底层的双轴向延伸率与临界延伸率之差成反比。一个单一的位错节点的系统能量和畴壁网络的周期的贡献的定量估计。周期的实验测量可以帮助验证完全不相称状态（例如通过层的相对旋转获得）相对于相称状态的能量。
The two-chain Frenkel-Kontorova model is applied for an analytical description of the energy and structure of the network of domain walls in bilayer graphene. Using this approach, the commensurate-incommensurate phase transition upon biaxial stretching of one of the graphene layers is considered. We demonstrate that formation of the equilateral triangular network of domain walls becomes energetically favourable above the critical relative biaxial elongation of the bottom layer of $3.0\cdot 10^{-3}$. It is shown that the optimal period of the triangular network of domain walls is inversely proportional to the difference between the biaxial elongation of the bottom layer and the critical elongation as long as it is much greater than the width of domain walls. Quantitative estimates of the contribution of a single dislocation node to the system energy and the period of the network of domain walls are obtained. Experimental measurements of the period could help to verify the energy of the fully incommensurate state (such as obtained by relative rotation of the layers) with respect to the commensurate one.
影响因子：
19.6
作者：
Kisslinger, Ferdinand;Ott, Christian;Weber, Heiko B.
通讯作者：
Weber, Heiko B.