Atomic point defects in two-dimensional materials

简要说明研究的背景，包括潜在的影响；在这个项目中，我们将在原子尺度上探索新的二维材料的电子和磁性。这项工作的主要工具将是低温扫描隧道显微镜和光谱学(STM/STS)。二维(2D)材料，如石墨烯和过渡金属二卤代化合物(TMD)，因其在未来电子器件中的潜在作用而受到人们的极大关注。在这里，我们将主要关注2D材料中新的原子点缺陷的性质，以及创建和耦合它们的方法，这些方法可以用于创建纳米电子器件。目标和目标主要目标是2D材料的生长和表征，以及通过沉积、溅射和/或直接原子操纵原位创建新的原子点缺陷。我们的目标是探索掺杂、费米能级钉扎的基本原理，缺陷在CDW态等现象出现中的作用，以及点缺陷的本征性质和点缺陷的纳米结构在纳米电子器件中的潜在应用。我们方法的新颖性在于能够原位产生原子点缺陷，并使用低温STM/STS在原子尺度上探索它们的性质。与EPSRC的战略和研究领域保持一致的是，EPSRCs的研究领域与凝聚态电子结构、凝聚态磁性和磁性材料、石墨烯和碳纳米技术、量子器件组件和系统。任何公司或合作者都涉及Zyvex实验室，美国德克萨斯州达拉斯参与了关于使用STM原子操纵在TMD材料上产生点缺陷的初步讨论。

Brief description of the context of the research including potential impact;In this project we will explore the electronic and magnetic properties of novel two-dimensional materials at the atomic scale. The principal tool for this work will be low temperature scanning tunnelling microscopy and spectroscopy (STM/STS). Two dimensional (2D) materials, such as graphene and the transition metal dichalcogenides (TMDs) are of great current interest for their potental role in future electronic devices. Here we will focus primarilly on the properties of novel atomic point defects in 2D materials, as well as methods by which to create and couple them in ways that can be exploited for the creation of nanoelectronic devices. Aims and objectivesThe primary aim will be the growth and characterisation of 2D materials and the in-situ creation of novel atomic point defects via deposition, sputtering, and/or direct atomic manipulation. We aim to explore the fundamentals of doping, Fermi level pinning, and the role of defects in the emergence of phenomena such as CDW states, as well as the intrinsic properties of point defects and nanostructures of point defects for potential application in nanoelectronic devices. Materials of interest are intercalated transitional metal dichalcogenides, novel 2D materials such as phosphorene and germanene, and graphene.Novelty of the research methodologyThe novelty of our approach lies in the ability to create the atomic point defects in-situ and to explore their properties at the atomic-scale using low temperature STM/STS.Alignment to EPSRC's strategies and research areasThere is strong overlap with the EPSRCs research areas Condensed Matter Electronic Structure, Condensed Matter Magnetism and Magnetic Materials, Graphene and Carbon Nanotechnology, Quantum Devices Components and Systems.Any companies or collaborators involvedZyvex Labs., Dallas, Texas, USA, have been involved with preliminary discussions regarding the creation of point defects on TMD materials using STM atomic manipulation.