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Manipulating magnetism on Graphene Nanoribbons(周苑副教授 南京大学物理学院)
发布时间: 2018-10-23 浏览次数: 13

【报告题目】Manipulating magnetism on Graphene Nanoribbons

【报告人】  周苑副教授 南京大学物理学院

【报告时间】1024日(周三)下午15:30-16:30

【报告地点】科技楼 29-414

【报告内容】Graphene have attracted intense interest due to the special electronic structure since its isolation. Exotic properties, such as the anomaly quantized Hall effect, quantum spin Hall effect, and strongly correlated nature etc, were theoretically predicted or experimentally realized. One of the widely concern issues is the magnetism on the graphene nanostructures for their potential applications on the spintronics. Here, we report theoretically that the magnetism on graphene nanoribbons with zigzag edges can be manipulated by the quantum interference and quantum confinement. An intriguing oscillatory behavior between the antiferromagnetic and ferromagnetic correlated edges upon the ribbon width is revealed. The magnetic phase can be engineered by the applying external field (magnetic or electric field). We further reported that a robust magnetic switch under strong electric field, in connecting with the special 3/4 filling crossing the inter- or intra-chain alternately.

【报告人简介】周苑:现任南京大学物理学院副教授, 2004年毕业于南京大学物理系,获理学博士学位。20042007年先后在南京大学和香港中文大学开展博士后研究,20152016年在美国Brookhaven国家实验室做访问学者。研究只要包括凝聚态物理中强关联电子系统、拓扑绝缘体等方面的理论研究,先后在Physical Review LetterNano Letters, Physical Review B等学术刊物合作发表近30篇学术论文。

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