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1月11日澳大利亚卧龙岗大学杜轶研究员报告会

报告题目: Silicene: A Silicon-based Dirac Fermion 2D material 

开始时间: 2016-01-11 11:00

报告地点: 实验一楼 大会议室

报  告  人: 澳大利亚卧龙岗大学 杜轶 研究员

报告人简介:  杜轶,博士,研究员,2011年毕业于澳大利亚卧龙岗大学(University of Wollongong)获得材料学博士学位。现在作为研究员供职于澳大利亚卧龙岗大学澳大利亚创新材料研究院(AIIM)和超导与电子材料研究所(ISEM)。他是扫描隧道显微镜、原子力显微镜实验室及低温物理实验室负责人。2015年,他被邀请担任英国自然杂志出版集团(Nature Publishing Group)下属《Scientific Reports》的编委成员。他的研究领域主要集中在开发新型二维材料及其表面物理化学性质的研究。截至2015年,杜轶研究院已著有专著章节两部,发表高水平论文(包括Nat. Commun.、Phys. Rev. Lett.、Adv. Mater.、Phys. Rev. B、ACS Nano、Adv. Funct. Mater.、ACS Catalysis、Sci. Rep.和Appl. Phys. Lett.)50多篇。 

报告内容简介:Silicene is a monolayer allotrope of silicon atoms arranged in a honeycomb structure with massless Dirac fermion characteristics, similar to graphene. It ensures development of silicon-based multifunctional nanoelectronic and spintronic devices operated at room temperature due to strong spin-orbit coupling. Nevertheless, until now, silicene could only be epitaxially grown on conductive substrates. The strong silicene-substrate interaction may depress its superior electronic properties. In my talk, I will briefly review the progress in research on silicene. And then, some new results will be reported, in which a quasi-free-standing silicene layer that has been successfully obtained through oxidization of bilayer silicene on the Ag(111) surface. The oxygen atoms intercalate into the underlayer of silicene, which can isolate the top layer of silicene from the substrate. In consequence, the top layer of silicene exhibits the signature of a 11 honeycomb lattice and hosts massless Dirac fermions due to much less interaction with the substrate. Furthermore, some exotic properties in silicene discovered by my group will be introduced. They are expected to promote performance of silicene-based electronic devices.