磁性性二维材料异质结构的制备与物性研究VIP专享

摘 要磁性二维材料是目前材料物理领域的热门材料之一。磁性二维材料不仅具备二维材料的优势，还显示独特且丰富的磁学特性。例如本征磁性可保持至单原子层厚度、层间的铁磁耦合或反铁磁耦合、层数依赖的磁学特性等，因此磁性二维材料及其异质结构在二维自旋电子学和磁学器件上具有重要的应用前景。本课题工作是制备磁性二维材料/石墨烯异质结构和其物性的研究，如磁性与输运性质。本工作通过微机械剥离法制备了磁性二维材料CrBr3、RuCl3二维薄膜和石墨烯薄膜；通过二维材料转移技术以及微纳加工技术来制备了 CrBr3/石墨烯异质结构的场效应晶体管（FET）器件。通过拉曼光谱对层状结构进行定性表征，通过四端法的电学测量对 CrBr3/石墨烯异质结构器件的输运性质进行表征。输运测量结果发现，经过异质结构的制备和微纳加工工艺，异质结构中的石墨烯仍保持良好的品质，在高的垂直磁场下出现石墨烯的量子霍尔效应；磁性二维材料的邻近作用能调制石墨烯及其器件的性能，例如狄拉克点位置、载流子迁移率等。此外，我们分析了影响 CrBr3/石墨烯异质结构质量的因素。- I -关键词： 磁性二维材料，石墨烯，异质结构，拉曼测量，四端法测量Preparation and physical properties of magnetic two-dimensional materials heterostructureAbstractMagnetic two-dimensional materials are one of the popular materials in the field of material physics. Magnetic two-dimensional materials not only have the advantages of two-dimensional materials, but also show unique and rich magnetic properties. For example, intrinsic magnetism can be maintained to the thickness of a single atomic layer, the ferromagnetic or antiferromagnetic coupling between layers, and the layer-dependent magnetic properties. Therefore, magnetic two-dimensional materials and their heterostructures have important application prospects in two-dimensional spintronics and magnetic devices. The work of this subject is the preparation of magnetic two-dimensional materials / graphene heterostructures and study on their physical properties, such as magnetic properties and transport properties. In this...