论文标题
尖端诱导的原子分辨范德华异质结构的激发发光纳米镜检查
Tip-induced excitonic luminescence nanoscopy of an atomically-resolved van der Waals heterostructure
论文作者
论文摘要
低温扫描隧道显微镜用于探测，具有原子尺度的空间分辨率，即范德华的异质结构的固有发光，该杂物是由过渡金属二进制金属元素单层制成的，堆叠在AU（111）底物的几层层片上。报道了由中性，充电和局部激子产生的急剧发射线。它们的强度和发射能随范德华异质结构的纳米级环境的函数而变化，这解释了使用衍射限制方法观察到的发射特性的可变性。我们的工作铺平了以原子级分辨率理解和控制Moiré超级晶格中光电现象的方式。
Low-temperature scanning tunneling microscopy is used to probe, with atomic-scale spatial resolution, the intrinsic luminescence of a van der Waals heterostructure, made of a transition metal dichalcogenide monolayer stacked onto a few-layer graphene flake supported by an Au(111) substrate. Sharp emission lines arising from neutral, charged and localised excitons are reported. Their intensities and emission energies vary as a function of the nanoscale environment of the van der Waals heterostructure, explaining the variability of the emission properties observed with diffraction-limited approaches. Our work paves the way towards understanding and control of optoelectronic phenomena in moiré superlattices with atomic-scale resolution.
