A new family of septuple-layer 2D materials of MoSi2N4-like crystals

IF 44.8 1区 物理与天体物理 Q1 PHYSICS, APPLIED Nature Reviews Physics Pub Date : 2024-06-17 DOI:10.1038/s42254-024-00728-x
T. Latychevskaia, D. A. Bandurin, K. S. Novoselov
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Abstract

Recently synthesized MoSi2N4 is the first septuple-layer two-dimensional material, which does not naturally occur as a layered crystal, and has been obtained with chemical vapour deposition growth. It can be considered as MoN2 crystal (with a crystal structure of MoS2) intercalating Si2N2 two-dimensional layer (with the structure similar to InSe). The discovery of this material has spurred on research into its electronic properties, and also to the prediction and classification of dozens of other members of the family. Whereas the originally synthesized MoSi2N4 is a semiconductor, some of the members of the family are also metallic, some are magnetic, some showing remarkable properties, such as very high room-temperature electron mobilities. The major interest towards these materials is coming from the septuple-layer structure, which allows not only multiple crystal phases but also complex compositions, in particular those with broken mirror-reflection symmetry against the layer of metal atoms. In this Review, we provide a profile of this new family of materials and discuss the possibilities they open up towards new physics and applications. A new class of septuple-layer 2D materials has been identified, with the first two members already synthesized: MoSi2N4 and WSi2N4. The possible variation of compositions and crystal structures make the new family of 2D materials very versatile and extremely attractive for research and applications.

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类似 MoSi2N4 晶体的七层二维材料新家族
最近合成的 MoSi2N4 是第一种通过化学气相沉积生长获得的七层二维材料,它不是自然形成的层状晶体。它可以看作是 MoN2 晶体(具有 MoS2 的晶体结构)夹杂着 Si2N2 二维层(具有与 InSe 相似的结构)。这种材料的发现促进了对其电子特性的研究,同时也推动了对该家族数十种其他成员的预测和分类。虽然最初合成的 MoSi2N4 是一种半导体,但该家族的一些成员也具有金属性和磁性,有些还显示出非凡的特性,如极高的室温电子迁移率。人们对这些材料的主要兴趣来自于其七层结构,这种结构不仅允许多种晶相,还允许复杂的成分,特别是对金属原子层具有破碎镜面反射对称性的成分。在本综述中,我们将介绍这一新材料家族,并讨论它们为新物理学和应用开辟的可能性。
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来源期刊
CiteScore
47.80
自引率
0.50%
发文量
122
期刊介绍: Nature Reviews Physics is an online-only reviews journal, part of the Nature Reviews portfolio of journals. It publishes high-quality technical reference, review, and commentary articles in all areas of fundamental and applied physics. The journal offers a range of content types, including Reviews, Perspectives, Roadmaps, Technical Reviews, Expert Recommendations, Comments, Editorials, Research Highlights, Features, and News & Views, which cover significant advances in the field and topical issues. Nature Reviews Physics is published monthly from January 2019 and does not have external, academic editors. Instead, all editorial decisions are made by a dedicated team of full-time professional editors.
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