锯齿边缘石墨烯纳米带的电子输运性质

Electronic transport in zigzag graphene nanoribbons

通过计算模拟研究了对称和非对称的边缘被氢原子饱和的锯齿型石墨烯纳米带(ZGNRs)的电子输运特性.电流与电压的关系是由量子输运的非平衡格林函数方法计算获得.研究表明,ZGNRs输运性质取决它们的宽度及对称性等因素.如果在计算中考虑自旋效应,我们发现,电流电压曲线有明显的改变,并与自旋过滤效应存在相关性.结果表明,ZGNRs具有作为恒流源材料的潜在应用价值且可能在未来的自旋电子器件中扮演重要角色.

We investigate electronic transport properties in symmetric and asymmetric zigzag graphene nanoribbons(ZGNRs) saturated by hydrogen atoms on both edges.The current versus voltage behavior is calculated by the non-equilibrium Green's function method for quantum transport.The ZGNRs transport properties depend on width and structural symmetry.When the spin effects are taken into account,the current-voltage curves change obviously and the spin filter phenomena appear.The result suggests that the ZGNRs might have application potential in constant flow sources and play an important role in future spintronic devices.