随着二维材料研究的不断深入，大面积高质量样品的制备成为限制二维拓扑和超导材料研究进展的技术瓶颈，是急需解决的关键问题。本项目我们将通过研究机械解理过程中的机理，探索二维材料新型机械解理技术。借助于该技术，制备出毫米量级尺寸高质量的单层1T'相MoTe2和WTe2材料，通过自主研制的先进深紫外激光角分辨光电子能谱对其电子结构进行研究，并通过器件测量探索输运中的量子行为。研究主要包括：1.探索新型机械解理技术，制备毫米量级以上的大面积单层材料；2.通过角分辨光电子能谱分析单层MoTe2和WTe2的电子结构；3.研究MoTe2材料中的超导电性及层数依赖关系；4.利用电输运测量手段，探索单双层MoTe2和WTe2中的拓扑性质。本研究所发展的新型机械解理方法将会极大的推动二维材料的研究进展，同时对单层MoTe2、WTe2材料的电子结构的研究也将有助于理解其超导及拓扑行为的起源及影响因素。

With the continuous development of two dimensional (2D) materials research, the preparation of large area and high quality samples is becoming the bottleneck for studying of 2D topological and superconductive materials, which is a key issue that needs urgent solution. In this project, we propose to carry out some systematic experiments to deeply understand the mechanism during exfoliation, and develop a new exfoliation technology for preparing 2D materials. By using the new exfoliation method, we are going to prepare millimeter size high quality monolayer MoTe2 and WTe2 (1T' phase), and using ultraviolet laser-based angle resolved photoemission spectroscopy (ARPES) to study their electronic structure, as well as some quantum transport behaviors in device measurements. We will focus on a few points: (1) to explore new exfoliation method and prepare millimeter size large area monolayer materials; (2) to capture the electronic structure of mononlayer MoTe2 and WTe2 by using ARPES; (3) to study the layer dependent superconductivity in MoTe2; (4) to explore the topological properties in MoTe2 and WTe2 by using electrical transport measurements. So the new developed mechanical exfoliation method will accelerate the progress in 2D materials' study, in the mean time, the electronic structure study of MoTe2 and WTe2 will be helpful to clarify the origin and influence factors of superconductivity and topological behaviors.