论文标题
Mose中的晶格重建
Lattice reconstruction in MoSe$_2$-WSe$_2$ heterobilayers synthesized by chemical vapor deposition
论文作者
论文摘要
半导体过渡金属二进制基因源的垂直范德华的异质结构实现了具有丰富相关电子相和Moiréexciton现象的Moiré系统。但是，对于像Mose $ _2 $ -WSE $ _2 $一样，对于小晶格不匹配和扭曲角度的材料组合，晶格重建消除了规范的Moiré模式，而是引起了一系列定期重建的纳米级域和介体范围内的纳米级范围，并在一个原子术中占据了一个原子疗法的扩展区域。在这里，我们阐明了原子重建在Mose中的作用$ _2 $ -WSE $ _2 $由化学蒸气沉积合成的异质结构。通过互补成像降低到原子量表，模拟和光谱法，我们确定了具有平行和抗平行对齐的异性恋中的MoiréType核心和扩展的MoiréNoce区的共存。我们的工作突出了化学蒸气沉积在需要横向扩展的异质系统或激子粘结异质阵列的应用的应用中的潜力。
Vertical van der Waals heterostructures of semiconducting transition metal dichalcogenides realize moiré systems with rich correlated electron phases and moiré exciton phenomena. For material combinations with small lattice mismatch and twist angles as in MoSe$_2$-WSe$_2$, however, lattice reconstruction eliminates the canonical moiré pattern and instead gives rise to arrays of periodically reconstructed nanoscale domains and mesoscopically extended areas of one atomic registry. Here, we elucidate the role of atomic reconstruction in MoSe$_2$-WSe$_2$ heterostructures synthesized by chemical vapor deposition. With complementary imaging down to the atomic scale, simulations, and optical spectroscopy methods we identify the coexistence of moiré-type cores and extended moiré-free regions in heterostacks with parallel and antiparallel alignment. Our work highlights the potential of chemical vapor deposition for applications requiring laterally extended heterosystems of one atomic registry or exciton-confining heterostack arrays.
