题目：Model and Transport Studies on Topological Materials with Dirac Valleys

报告人：单文语 博士后

                 美国卡内基梅隆大学物理系

时间：2017年12月18日下午14:30

地点：国家脉冲强磁场科学中心C204

报告摘要：

Topological materials have attracted much recent interest from both theoretical and experimental sides. The existence of  Dirac valleys gives rise to exotic transport and optical properties. In this talk, I will focus on two types of systems with Dirac valleys: topological insulators and two-dimensional materials. For topological insulators, I will introduce the finite-size effect and the construction of effective model for thin film structure. For two-dimensional materials, I will discuss the recent puzzles on valley Hall experiments in graphene systems and our solutions. Furthermore I will talk about the generation and detection of pure valley current by optical approach in monolayer transition metal dichalcogenides.

报告人简介：

单文语，博士，2004至2008年在南京大学物理系学习并获得学士学位；2012年毕业于香港大学凝聚态物理专业，并获得博士学位；2012年至今在美国卡内基梅隆大学物理系从事博士后研究。主要从事新型材料的输运和光学性质理论研究。研究兴趣包括：新型二维材料，拓扑材料等，已发表学术论文17篇，总引用1500多次，H因子12；其中Nature子刊、Science子刊、PRL等国际顶级期刊4篇。单篇引用超过100次的论文4篇，5篇文章入选ESI 1%高被引用论文。

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