Deilmann Thorsten, Rohlfing Michael, Wurstbauer Ursula
Institut für Festkörertheorie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str.10, 48149 Münster, Germany.
Institute of Physics, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str.10, 48149 Münster, Germany.
J Phys Condens Matter. 2020 May 15;32(33). doi: 10.1088/1361-648X/ab8661.
Even if individual two-dimensional materials own various interesting and unexpected properties, the stacking of such layers leads to van der Waals solids which unite the characteristics of two dimensions with novel features originating from the interlayer interactions. In this topical review, we cover fabrication and characterization of van der Waals hetero-structures with a focus on hetero-bilayers made of monolayers of semiconducting transition metal dichalcogenides. Experimental and theoretical techniques to investigate those hetero-bilayers are introduced. Most recent findings focusing on different transition metal dichalcogenides hetero-structures are presented and possible optical transitions between different valleys, appearance of moiré patterns and signatures of moiré excitons are discussed. The fascinating and fast growing research on van der Waals hetero-bilayers provide promising insights required for their application as emerging quantum-nano materials.
即使单个二维材料具有各种有趣且意想不到的特性，但这些层的堆叠会形成范德华固体，它将二维特性与源自层间相互作用的新特性结合在一起。在本专题综述中，我们涵盖了范德华异质结构的制备和表征，重点是由半导体过渡金属二硫属化物单层制成的异质双层。介绍了研究这些异质双层的实验和理论技术。展示了针对不同过渡金属二硫属化物异质结构的最新研究结果，并讨论了不同谷之间可能的光学跃迁、莫尔条纹图案的出现以及莫尔激子的特征。对范德华异质双层的迷人且快速发展的研究为其作为新兴量子纳米材料的应用提供了所需的有前景的见解。
