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