标题： 电子计数和二维半导体的一大类 显示英文标题

标题： Electron counting and a large family of two-dimensional semiconductors

摘要： 与传统半导体相比，二维半导体（2DSC）材料的选择非常有限。 基于适当的电子计数，我们提出了一大类2DSC，它们采用相同的结构，并且仅由主族元素组成。 使用先进的密度泛函计算，我们证明了这些材料的可实现性，并表明它们涵盖了广泛的晶格常数、带隙和带边态，因此是异质结的良好候选材料。 这一类二维材料可能为在与三维半导体相同繁荣水平上制造2DSC器件铺平道路。 显示英文摘要

摘要： Comparing with the conventional semiconductors, the choice of the two dimensional semiconductor (2DSC) materials is very limited. Based on proper electron counting, we propose a large family of 2DSCs, all adopting the same structure and consisting of only main group elements. Using advanced density functional calculations, we demonstrate the attainability of these materials, and show that they cover a large range of lattice constants, band gaps and band edge states, therefore are good candidate materials for heterojunctions. This family of two dimensional materials may pave a way toward fabrication of 2DSC devices at the same thriving level as 3D semiconductors.