金属性二维碲化物晶体呈现出独特的超导/电荷密度波(SC/CDW)等特性，展示出重要的科学意义与潜在的应用前景。但因其理化性质不稳定，易氧化等原因，至今很难通过化学合成法获得稳定的二维晶体材料，因此，对薄膜SC/CDW特性研究难以顺利开展。本项目拟将成功用于生长体块单晶的化学气相输运法(CVT)拓展到制备金属性二维碲化物晶体，通过对晶体生长动力学进行精准调控，合成了以NbTe2、TaTe2为代表的多种高质量、本征态、层数可控的金属性二维碲化物晶体。深入研究层数、堆垛角度等结构要素与SC/CDW特性的关系，为理解二维晶体的SC/CDW机制提供新思路。并在生长过程中进行原位掺杂，通过掺杂改变化学组成进而调控SC/CDW特性。本项目将为金属性二维碲化物晶体的化学合成与化学调控提供重要的研究基础，对于探索这一新颖材料体系的物理化学新现象、拓展二维晶体的物理化学规律具有重要的意义。

Metallic two-dimensional tellurides atomic crystals exhibit unique superconducting/charge density wave (SC/CDW) characteristics, showing important scientific significance and potential application prospects. However, due to its unstable physical and chemical properties, it is difficult to obtain stable two-dimensional atomic crystals by chemical synthesis so far. Therefore, the study of SC/CDW characteristics of thin films is difficult to carry out smoothly. In this project, the chemical vapor transport (CVT) method, which has been successfully applied to the growth of bulk single crystals, will be extended to the preparation of metallic two-dimensional tellurides atomic crystals. By precisely controlling the crystal growth kinetics, a variety of high-quality, intrinsic and controllable two-dimensional telluride crystals with gold properties, such as NbTe2 and TaTe2, will be synthesized. In order to understand the mechanism of SC/CDW in two-dimensional crystals, the relationship between SC/CDW characteristics and structural factors such as layers and stacking angles is studied in depth. In-situ doping was carried out during the growth process, and the chemical composition was changed by doping to regulate the SC/CDW characteristics. This project will provide an important research basis for the chemical synthesis and regulation of metal two-dimensional telluride crystals. It is of great significance for exploring the new physical and chemical phenomena of this novel material system and expanding the physical and chemical laws of two-dimensional crystals.