| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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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| Cite this article: |
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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.
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| Keywords:
72.80.Rj
73.23.-b
73.63.-b
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Received: 23 November 2009
Published: 28 July 2010
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| PACS: |
72.80.Rj
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(Fullerenes and related materials)
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73.23.-b
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(Electronic transport in mesoscopic systems)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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