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4月1日9:30学术报告:Prediction of two dimensional topological insulators in honeycomb structure
4月1日学术报告:Prediction of two dimensional topological insulators in honeycomb structure

报告题目:Prediction of two dimensional topological insulators in honeycomb structure

报告人:Feng-Chuan Chuang (庄丰权), Professor (National Sun Yat-sen University, Kaohsiung)

邀请人:周雨青 教授

时间:41日(周三) 上午9:30

地点:田家炳楼南203会议室

摘要:Band topology of strained buckled honeycomb consisting of different elements (IV, V and III-V) as well as those placed on a variety of semiconducting and insulating substrates are systematically investigated using first-principles calculations [1-3]. Topological phase diagrams of these free-standing bilayers are generated to help guide the selection of suitable substrates. The insulating hexagonal-BN is identified as the best candidate substrate material for supporting nontrivial topological insulating phase of bilayer thin films. In addition, some metal induced reconstructed substrates which have the metallic bonding and are semiconducting can be used as templates to grow 2D topological insulators. Furthermore, the bonding between honeycomb structures and substrates can be realized as H-passivation to 2D TIs. This opens up new opportunities for the scientists in the field of surface science.

[1] F. C. Chuang*, L. Z. Yao, Z. Q. Huang, Y. T. Liu, C. H. Hsu, T. Das, H. Lin*, and A. Bansil, Nano Lett. 14, 2505 (2014)

[2] Z. Q. Huang, C. H. Hsu, F. C. Chuang*, Y. T. Liu, H. Lin*, W. S. Su, V. Ozoilns, A. Bansil, New J. of Physics, 16 (2014).

[3] Chia-Hsiu Hsu, Zhi-Quan Huang, Feng-Chuan Chuang*, Chien-Cheng, Kuo, Yu-Tzu Liu, Hsin Lin*, Arun Bansil The nontrivial electronic structure of Bi/Sb honeycombs on SiC(0001), New J. Phys. 17, 025005 (2015).

报告人简介:

庄丰权教授2005年博士毕业于美国爱荷华州立大学,于2006年加入台湾高雄中山大学物理系,现为该系教授和系主任。庄丰权教授的研究领域为计算凝聚态物理,关注于各种有趣的材料系统的第一性原理计算,包括原子团簇、半导体表面和界面、石墨烯、拓扑绝缘体、二维层状结构、氢储存材料等。庄丰权教授迄今在Nano Letters, New Journal of Physics 等刊物上发表论文40余篇。
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