Chin. Phys. Lett.  2010, Vol. 27 Issue (8): 087204    DOI: 10.1088/0256-307X/27/8/087204
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Numerical Analysis of Alternating-Current Small-Signal Response in Graphene Nanoribbons

CHEN Zhi-Dong, ZHANG Jin-Yu, YU Zhi-Ping

Institute of Microelectronics, Tsinghua University, Beijing 100084
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CHEN Zhi-Dong, ZHANG Jin-Yu, YU Zhi-Ping 2010 Chin. Phys. Lett. 27 087204
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Abstract

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.

Keywords: 72.80.Rj      73.23.-b      73.63.-b     
Received: 23 November 2009      Published: 28 July 2010
PACS:  72.80.Rj (Fullerenes and related materials)  
  73.23.-b (Electronic transport in mesoscopic systems)  
  73.63.-b (Electronic transport in nanoscale materials and structures)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/27/8/087204       OR      https://cpl.iphy.ac.cn/Y2010/V27/I8/087204
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CHEN Zhi-Dong
ZHANG Jin-Yu
YU Zhi-Ping
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