Theoretical Study on Electronic and Spintronic Properties of Nano-Carbon Topology Material

在本研究项目中，我们利用数值和解析技术研究了杂质、边缘形状和磁场对石墨烯纳米带电子输运性质的影响。结果表明，表征电子输运的物理量，如电导及其波动，主要取决于石墨烯纳米带的边缘形状和手性。此外，我们还发现含有远程杂质的无序之字形纳米带，其范围大于晶格常数，具有完美的导电通道，即在准一维体系中不存在安德森局域化。

In this research program, we have focused the effect of impurity, edge shape and magnetic field on the electronic transport properties of graphene nanoribbons using numerical and analytic techniques. It was shown that the physical quantities characterizing the electronic transport such as conductance and its fluctuation crucially depend on the edge shape and chirality of graphene nanoribbons. Also, we have found that disordered zigzag nanoribbon with long-ranged impurities whose range is larger than the lattice constant possesses a perfectly conducting channel, i.e. absence of Anderson localization in spite of the quasi-one dimensional systems.