Quantum layertronics in van der Waals systems

None Xiao Cong, None Yao Wang
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Abstract

In van der Waals systems, the interlayer van der Waals coupling between adjacent atomically thin layers renders the electronic wave function to reside on more than one specific layer, promoting the layer degree of freedom from a spatial object to a quantum mechanical pseudospin. The coupling of layer degree of freedom with the in-plane center-of-mass motion of electrons shapes nontrivial layer pseudospin structures in momentum space, leading to various new quantum geometric properties in an extended parameter space unique to lattice mismatched van der Waals systems. They underly a plenty of novel transport and optical effects, linear and nonlinear responses, and offer new pathways towards device applications, constituting the research frontiers of quantum layertronics. This article provided a brief review of this emerging research direction, and discussed possible developments in near future based on its crossings with other intensive research fields such as nonlinear electronics, twistronics and chiral electronics.
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范德华体系中的量子层电子学
在范德华体系中,相邻原子薄层之间的层间范德华耦合使得电子波函数在多个特定层上扩散,将空间离散层自由度转化为量子力学自由度。层自由度与平面内电子质心运动的耦合在动量空间中形成非平凡层伪自旋结构,在扩展参数空间中产生各种新的量子几何性质,这是晶格失配范德华体系所特有的。它们引发了许多新颖的传输和光学效应,线性和非线性响应,并为器件应用提供了新的途径,成为量子层电子学的研究前沿。本文简要介绍了这一新兴的研究方向,并讨论了其与非线性电子学、旋流电子学和手性电子学等其他研究领域的交叉发展。
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