| 报告题目： |
Topological phase and electronic-mechanical coupling in 2D materials |
| 报告人： |
寇良志 博士 |
| 报告人单位： |
昆士兰科技大学，新南威尔士大学讲师 |
| 报告时间： |
2016年10月19日下午15：00 |
| 报告地点： |
科技楼北410 |
| 报告摘要： |
|
| |
The discovery and exploration of graphene has stimulated intensive research in recent years, leading to the identification and study of a wide range of two-dimensional (2D) materials that exhibit a rich variety of novel structural, electronic, catalytic, and mechanical properties. The research for the new family has led to significant technical advances and promising application in nanodevices. Here we first show the interesting topological phases in 2D layered materials using graphene sandwich structure as an example. Then the electronic-mechanical coupling in new synthesized boron sheet is presented, it is found that borophane is auxetic with a surprising negative Poisson’s ratio stemming from its unique puckered triangle hinge structure and the associated hinge dihedral angle variation under a tensile strain in the armchair direction. We also identify borophane to be ferroelastic with a stress-driven 90-degree lattice rotation in the boron layer, accompanied by a remarkable orientation switch of the anisotropic Dirac transport channels. |
| 报告人简介： |
|
| |
寇良志博士昆士兰科技大学，新南威尔士大学讲师，研究兴趣：二维拓扑绝缘体；低维纳米材料(Graphene，Phosphorene，Borophene等)的力-电-磁学性质以及它们相互之间的耦合；低维材料的气体吸附，氢储存，太阳能电池; 第一原理计算（DFT），被邀请为材料领域，物理，化学类国际顶级杂志担任审稿人。 |
