Abstract Recent achievements in the fabrication of two-dimensional (2D) materials by molecular beam epitaxy have demonstrated that surface alloys are critical intermediates for either layer by layer or segregation growth. The resulting films show a homogenous growth mode that strongly depends on the lattice and properties of surface alloys. Learning from the periodic table, we address the importance of surface alloys in the heterogeneous growth of 2D materials. We demonstrate basic rules in the formation of surface alloys that are correlated with their periodic properties. We highlight the possibility of using 2D topological insulators as the substrates to accomplish quasifreestanding monolayers. Finally, we assess the current status and challenges of binary 2D materials and discuss prospects of their fabrication via surface alloy processes.

中文翻译：

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元素二维材料的外延生长：我们可以从元素周期表中学到什么？

摘要 通过分子束外延制造二维 (2D) 材料的最新成果表明，表面合金是逐层生长或偏析生长的关键中间体。所得薄膜显示出强烈依赖于表面合金的晶格和性质的均匀生长模式。从元素周期表中学习，我们解决了表面合金在二维材料异质生长中的重要性。我们展示了与其周期性特性相关的表面合金形成的基本规则。我们强调了使用 2D 拓扑绝缘体作为基板来实现准独立单层的可能性。最后，我们评估了二元 2D 材料的现状和挑战，并讨论了通过表面合金工艺制造的前景。