论文标题
在分层量子材料中的光诱导的六角状态
Light-induced hexatic state in a layered quantum material
论文作者
论文摘要
材料属性的可调节性通过Light承诺在能源转换和信息技术中的许多未来应用。密切相关的材料（例如过渡金属二盐元素化（TMDC））通过光播种提供了电子相，电荷顺序和层间相关性的光学控制。在这里，我们发现在激光诱导的两个电荷密度波（CDW）阶段之间的TMDC薄膜中的瞬时六角状态的出现。引入倾斜系列超快纳米氨基电子衍射，我们在高动量分辨率下重建CDW摇摆曲线。三维结构相关性的间歇性抑制促进了示象中间体的平面内翻译顺序特征的丧失。我们的结果表明，在追踪耦合顺序参数中，层析成像超快结构探测的优点，使纳米级通用纳米级访问激光诱导的功能异质结构和设备中的尺寸控制。
The tunability of materials properties by light promises a wealth of future applications in energy conversion and information technology. Strongly correlated materials such as transition-metal dichalcogenides (TMDCs) offer optical control of electronic phases, charge ordering and interlayer correlations by photodoping. Here, we find the emergence of a transient hexatic state in a TMDC thin-film during the laser-induced transformation between two charge-density wave (CDW) phases. Introducing tilt-series ultrafast nanobeam electron diffraction, we reconstruct CDW rocking curves at high momentum resolution. An intermittent suppression of three-dimensional structural correlations promotes a loss of in-plane translational order characteristic of a hexatic intermediate. Our results demonstrate the merit of tomographic ultrafast structural probing in tracing coupled order parameters, heralding universal nanoscale access to laser-induced dimensionality control in functional heterostructures and devices.
