Numerical Analysis of Alternating-Current Small-Signal Response in Graphene Nanoribbons

作     者：陈志东 张进宇 余志平 

作者机构：Institute of Microelectronics Tsinghua University Beijing 100084 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2010年第27卷第8期

页      面：172-175页

核心收录：

学科分类：07[理学] 08[工学] 082304[工学-载运工具运用工程] 080204[工学-车辆工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 070102[理学-计算数学] 0802[工学-机械工程] 0704[理学-天文学] 0701[理学-数学] 0823[工学-交通运输工程] 

基　　金：国家973计划 

主　　题：ALTERNATING currents NUMERICAL analysis SIGNAL processing GRAPHENE NANOSTRUCTURED materials GREEN'S functions ENERGY gaps (Physics) 

摘      要：Alternating-current small-signal admittances of armchair graphene nanoribbons are investigated using the method of non-equilibrium Green＇s function. The calculated ac admittances show an oscillatory response between inductive and capacitive behaviors, which is a result of the finite length of the graphene nanoribbon. The effects of hydrogen-passivated edges on ac response are demonstrated. At low frequency, the edge effects transform the inductive behavior in a metallic graphene nanoribbon into a capacitive one. Finally, the effects of variations in the width and bandgap of a graphene nanoribbon on its dynamic response are investigated.