报告题目(中文)：二维锗烯的外延生长与电子学性质

报告内容简介：Germanene, the germanium analogue of graphene, is in many aspects very similar to graphene, but in contrast to the planar graphene lattice, the germanene honeycomb lattice is slightly buckled and composed of two vertically displaced sub-lattices [1]. Frist principles total energy calculations have revealed that freestanding germanene is a two-dimensional Dirac fermion system, i.e. the electrons behave as massless relativistic particles that are described by the Dirac equation, i.e. the relativistic variant of the Schrödinger equation. Recently, it has been shown that germanene can be synthesized on various substrates, including MoS2 and Ge2Pt [2-4]. As predicted germanene’s honeycomb lattice is indeed buckled and the experimentally measured density of states exhibits a V-shape, which is one of the hall marks of a two-dimensional Dirac system. Spatial maps of the Dirac point of germanene synthesized on MoS2 reveal the presence of charge puddles, which are induced by charged defects of the underlying substrate [5]. [1] A. Acun, L. Zhang et al. J. Phys. Cond. Mat. 27, 443002 (2015) [2] P. Bampoulis, L. Zhang et al. J. Phys. Cond. Mat., 26, 442001 (2014). [3] L. Zhang et al., Appl. Phys. Lett. 107, 111605 (2015). [4] L. Zhang et al. Phys. Rev. Lett. 116, 256804 (2016). [5] L. Zhang* et al. Appl. Phys. Lett. 114, 041601, (2019)

报告人姓名：张利杰

报告人简介(中文)：张利杰，湖南大学副教授。2010至2013在上海大学攻读硕士学位，师从雷作胜教授。之后赴荷兰，于2017年获得荷兰特文特大学博士学位。2018年3月起就职于湖南大学物理与微电子科学学院。研究方向为：低维纳米结构与物性，扫描隧道显微镜，新型二维材料等。已在包括PRL、APL等学术期刊发表论文多篇。

报告人单位(中文)：湖南大学物理与微电子科学学院

报告时间：2019-07-19 14:00

报告地点：材料学院520报告厅

主办单位：上海大学材料学院

联系人：陈超越