报告题目:Searching for substrate-supported 2D topological materials
Study of two-dimensional (2D) topological insulators (TIs), also known as quantum spin Hall (QSH) insulators, is currently one of the fastest growing research areas. While these novel materialsare insulators in the bulk, their edges harbor spin-polarized gapless states with Dirac-cone-like linear energy dispersions. These unique properties make topological insulator materials well-suited for the development of spintronics and quantum computing. The functional 2D sheet often needs to be placed on a substrate in a device setting, but the electronic and topological properties of freestanding films will likely be affected by the substrate. Therefore, it is highly desirable to search for large-gap QSH states existing on a substrate while maintaining a large gap. In this talk, I will present some of the recent work we have done to search for the 2D topological materials supported on appropriate substrates based on first-principles calculations. (1) Quantum anomalous Hall (QAH): Germanene asymmetrically functionalized with H and N atoms and on CdTe(111); (2) Growth of Predicted Novel Two-Dimensional Topological Insulator Based on InBi-Si(111)-√×√.
黄丽,南方科技大学物理系助理教授。研究领域为计算凝聚态物理。主要致力于用第一性原理方法结合其他多种先进的计算模拟手段研究各种新能源材料和新型自旋电子材料的性质。在新材料的计算设计和材料中新奇的电、磁性质，电热输运性质，拓扑性质以及缺陷研究方面取得了一系列成果。迄今已在 Science, Physical Review Letters, Physical Review B, Applied Physics Letters, Journal of American Chemistry Society, ACS Nano, Advanced Materials, Advanced Functional Materials, Energy & Environmental Society, Nano Energy 等著名SCI期刊上发表论文50多篇,多次在国际国内会议上做邀请报告，担任Physical Review Letters等多种国际上著名期刊的长期审稿人。目前担任学术期刊《半导体学报》编委。