构建量子扭动显微镜：设计见解与实验考虑
Constructing a Quantum Twisting Microscope: Design Insights and Experimental Considerations
AI总结：
本文介绍量子扭动显微镜的构建与测试，展示其在层状材料中实现扭角依赖电子测量的能力，通过详细设计和对齐流程验证了其在晶格扭角依赖输运特性上的应用潜力。
摘要：
我们报告了量子扭动显微镜的构建和测试细节，这是一种 recently developed 扫描探针仪器，能够对层状材料进行扭角依赖的电子测量。我们的实现基于一台商用原子力显微镜，其开放几何结构下方允许集成旋转和翻译阶段，以实现 QTM 操作。我们描述了完整的制造过程，包括通过聚焦离子束沉积和石墨转移进行尖端准备，定制的带有集成旋转能力的阶段组装，以及多步骤对齐程序。为了验证仪器，我们进行了石墨层之间导电性测量，作为扭角函数，观察到清晰的 60 度周期性，与六边形晶格对称性和接近扭角 21.8 和 38.2 度附近的导电性增强一致。这些结果确认了仪器能够解析晶格扭角依赖的输运特性。通过提供详细的构建和操作指南，我们旨在使 QTM 技术对具有标准 AFM 基础设施的研究组可用，从而能够研究范德瓦耳斯材料、复杂氧化物异质结构和手性系统中的扭角依赖现象。
英文摘要：
We report the details of construction and testing of a Quantum Twisting Microscope, a recently developed scanning probe instrument that enables twist angle dependent electronic measurements on layered materials. Our implementation is based on a commercial atomic force microscope whose open geometry beneath the scan head allows integration of the rotation and translation stages required for QTM operation. We describe the complete fabrication process including tip preparation by focused ion beam deposition and graphite transfer, custom stage assembly with integrated rotation capability, and multistep alignment procedures. To validate the instrument, we perform conductance measurements between graphite layers as a function of twist angle, observing clear 60 degree periodicity consistent with the hexagonal lattice symmetry and conductance enhancements near the commensurate twist angles of 21.8 and 38.2 degrees. These results confirm the instruments ability to resolve crystallographic twist angle dependent transport features. By providing detailed construction and operational guidelines, we aim to make QTM technology accessible to research groups with standard AFM infrastructure, enabling investigations of twist angle dependent phenomena in van der Waals materials, complex oxide heterostructures and chiral systems.
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