论文标题
范德华的动力学限制的两步增长冰honeycomb SB单层
Kinetics-Limited Two-Step Growth of van der Waals Puckered Honeycomb Sb Monolayer
论文作者
论文摘要
最近通过分子束外延成功生长的黑磷酸蜂窝SB单层是黑磷烯的结构类似物。然而，关于这种臭味蜂窝单层的生长机制的迄今为止鲜为人知。在这项研究中，通过将扫描隧道显微镜与第一原理密度的功能理论计算结合使用，我们揭示了冰泡的蜂窝SB单层采用动力学限制的两步增长模式。随着SB的覆盖范围的增加，SB原子首先形成扭曲的六角形晶格，因为半层层，然后扭曲的六边形半层转化为冰pucked的蜂窝状晶格，作为整层。这些结果提供了理解浸泡蜂窝单层的生长机理的原子级见解，并且可以对具有相同结构的其他单层的直接增长具有启发性。
Puckered honeycomb Sb monolayer, the structural analog of black phosphorene, has been recently successfully grown by means of molecular beam epitaxy. However, little is known to date about the growth mechanism for such puckered honeycomb monolayer. In this study, by using scanning tunneling microscopy in combination with first-principles density functional theory calculations, we unveil that the puckered honeycomb Sb monolayer takes a kinetics-limited two-step growth mode. As the coverage of Sb increases, the Sb atoms firstly form the distorted hexagonal lattice as the half layer, and then the distorted hexagonal half-layer transforms into the puckered honeycomb lattice as the full layer. These results provide the atomic-scale insight in understanding the growth mechanism of puckered honeycomb monolayer, and can be instructive to the direct growth of other monolayers with the same structure.
