报告主题：Quantum spin Hall effect and tunable spin transport in As-graphane

报告嘉宾：张礼智博士（美国橡树岭国家实验室纳米材料科学中心）

时　　间：2017年9月26日（周二）下午 2:30-4:00

地　　点：南区物理与能源学院N1206会议室

 

报告摘要：

    Tunable spin transport in nano devices is highly desirable to spintronics. Here, we predict existence of quantum spin Hall effects and tunable spin transport in As-graphane, based on first-principle density functional theory and tight binding calculations. Monolayer As-graphane is constituted by using As adsorbing on graphane with honeycomb H vacancies. Owing to the surface strain, monolayer As-graphane nanoribbons will self-bend toward the graphane side. The naturally curved As-graphane nanoribbons then exhibit unique spin transport properties, distinctively different from the flat ones, which is a two-dimensional topological insulator. Under external stress, one can realize tunable spin transport in curved As-graphane nanoribon arrays. Such intriguing mechanical bending induced spin flips can offer promising applications in the future nano-spintronics devices.

 

报告人简介：

   张礼智博士毕业于中科院物理所，现就职于美国橡树岭国家实验室纳米材料科学中心，从事二维材料、表面界面系统以及化学催化反应等方面的研究。目前，张礼智博士已在JACS，Nano Letter, ACS Nano, SMALL, PRB 等杂志发表研究论文30多篇，H-index为15，总引用大于1400。

 

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