Zigzag边界石墨烯纳米带错层α型叠加的输运性质研究  

Electronic transport via partially stacked zigzag graphene nanoribbons

作　　者：刘华[1,2] 王雪峰 蒋永进[1] 

机构地区：[1]浙江师范大学物理系,浙江金华231004 [2]苏州大学物理科学与技术学院,江苏苏州215012

出　　处：《苏州大学学报（自然科学版）》2012年第1期59-63,共5页Journal of Soochow University(Natural Science Edition)

基　　金：国家自然科学基金项目(11074182;10804080;11004174)

摘　　要：用基于第一性原理的密度泛函理论和非平衡格林函数理论的计算模拟方法研究了不同宽度错层叠加锯齿边缘型石墨烯纳米带(ZGNRs)的电子输运特性.与单层ZGNRs相比,错层叠加ZGNRs中存在层间界面,因而在该系统中能够实现更加丰富的电学特性.研究表明,错层叠加ZGNRs中能较容易实现负微分电阻现象.这使得错层叠加ZGNRs有可能被用来制作电子振荡器件.We investigate the electronic transport in partially stacked zigzag graphene nanoribbons(ZGNRs) employing a simulation method based on the first principle density functional theory with the non-equilibrium Green's functions.Compared to the monolayer ZGNRs,the partially stacked ZGNRs have an interface between the stacked area,therefore it is possible to further manipulate the electronic properties in these systems.Our study shows that the negative differential resistance can be easily realized in partial stacked ZGNRs.This suggests that the partial stacked ZGNRs might be employed in devices such as electric oscillators.

关 键 词：量子输运 叠加石墨烯纳米带 第一性原理 格林函数 

分 类 号：O488[理学—固体物理] O469[理学—物理]