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A Perspective on Collective Properties of Atoms on 2D Materials
Advanced Electronic Materials ( IF 6.2 ) Pub Date : 2021-10-12 , DOI: 10.1002/aelm.202100607
Adrian Del Maestro 1, 2, 3 , Carlos Wexler 4 , Juan M. Vanegas 3 , Taras Lakoba 5 , Valeri N. Kotov 3
Affiliation  

Atoms deposited on 2D electronic materials, such as graphene, can exhibit unconventional many-body correlations, not accessible in other settings. All of these are driven by van der Waals forces: between the atoms themselves and atom-material interactions. For example 4He atoms on 2D materials can potentially form a variety of exotic quantum states of matter, such as 2D supersolids and superfluids, in addition to solid phases. For the “most quantum” case of a single helium layer we discuss, from a theoretical perspective, how the effective low-energy (Bose–Hubbard) description can take advantage of the extreme sensitivity of this unique system to the interplay between the atomic (helium) and solid-state (graphene) components. Due to the extraordinary variety and tunability of 2D electronic materials, it is envisaged that a wide range of correlated atomic phases can be realized under favorable conditions. Exciting possibilities in the opposite extreme of many atomic layers forming a liquid on top of graphene are also outlined —in this case a so-called “spinodal dewetting” pattern can form at the liquid–vapor interface which reflects the presence and electronic properties of graphene underneath. Such patterns could be manipulated by choosing different atoms and materials, with potential technological applications.

中文翻译:

二维材料上原子集体性质的观点

沉积在 2D 电子材料(如石墨烯)上的原子可以表现出非常规的多体相关性,在其他环境中是无法访问的。所有这些都是由范德华力驱动的:原子本身和原子-材料之间的相互作用。例如4除了固相之外,二维材料上的氦原子还可能形成各种奇异的物质量子态,例如二维超固体和超流体。对于单个氦层的“最量子”情况,我们从理论角度讨论有效低能(Bose-Hubbard)描述如何利用这个独特系统对原子之间相互作用的极端敏感性(氦)和固态(石墨烯)组件。由于二维电子材料的多样性和可调性,可以设想在有利的条件下可以实现广泛的相关原子相。还概述了在石墨烯顶部形成液体的许多原子层的相反极端的令人兴奋的可能性——在这种情况下,可以在液-气界面处形成所谓的“旋节线去润湿”图案,这反映了石墨烯的存在和电子特性下。可以通过选择不同的原子和材料来操纵这种模式,并具有潜在的技术应用。
更新日期:2021-10-12
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