Recent research on ferroelectrics based on two‐dimensional (2D) materials may lead to a technological revolution, offering much higher density for integration as well as a better combination of semiconductor properties and non‐volatile memories at the nanoscale compared with traditional ferroelectrics. In addition, ferroelectricity can be much more robust than ferromagnetism in 2D. In this study, we review the studies on 2D ferroelectricity starting from 2013, which are mainly first‐principles predictions, including functionalization‐induced 2D ferroelectricity in prevalent non‐polar 2D materials as well as 2D intrinsic ferroelectricity, which are either in‐plane or vertical. Although the number of reports on 2D ferroelectricity is still small compared to the large amount of research on 2D ferromagnetism, the potential of these materials to unravel new science and technology has stimulated considerable interest in 2D ferroelectricity, making it a fast developing field. It is interesting to note that 2D ferroelectricity was experimentally realized a year before 2D ferromagnetism, and the large difference in the Curie temperatures of these materials has further demonstrated that 2D ferroelectricity could be much more robust than 2D ferromagnetism.

中文翻译：

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二维Van der Waals铁电体的兴起

基于二维（2D）材料的铁电体的最新研究可能会引发技术革命，与传统铁电体相比，纳米级提供更高的集成密度以及更好的纳米级半导体特性和非易失性存储器组合。另外，在2D模式下，铁电比铁磁要坚固得多。在本研究中，我们回顾了从2013年开始的2D铁电学研究，这些研究主要是第一性原理预测，包括常见的非极性2D材料中的功能化诱导2D铁电以及平面内或2D本征铁电。垂直的。尽管与2D铁磁学方面的大量研究相比，2D铁电学的报告数量仍然很少，这些材料开发新科学技术的潜力激发了人们对二维铁电的极大兴趣，使其成为一个快速发展的领域。有趣的是，二维铁电在2D铁磁之前的一年就已经通过实验实现，而且这些材料的居里温度的巨大差异进一步表明2D铁电比2D铁磁更坚固。