Electron transport in folded graphene junctions

Yuee Xie, Yuanping Chen, Xiao Lin Wei, and Jianxin Zhong
Phys. Rev. B 86, 195426 – Published 26 November 2012

Abstract

Using Green's function method, electron transport in graphene folding junctions (GFJs) are studied. All of these junctions are bilayer structures with AA or AB stacking. As for the AA-stacking GFJs, their transport properties are strongly dependent on the edge form and folding angle. The armchair GFJs (AGFJs) with a folding angle of 60 have high reflection to electrons, while those with a folding angle of 120 are nearly reflectionless and transparent. The zigzag GFJs (ZGFJs) show an opposite transport behavior: The junctions with a folding angle of 60 are nearly transparent while those of folding angle 120 have high reflection. As for the AB-stacking GFJs, their transport properties are insensitive to the edge form or folding angle, and all junctions exhibit less reflection to electrons. In addition, interesting edge states different from those in the unfolded nanoribbons are found in the GFJs. Our results indicate that GFJs can be served either as resistors for tuning attenuation of currents or as interconnects for changing directions of current in all graphene-based nanoelectronics.

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  • Received 16 May 2011

DOI:https://doi.org/10.1103/PhysRevB.86.195426

©2012 American Physical Society

Authors & Affiliations

Yuee Xie, Yuanping Chen*, Xiao Lin Wei, and Jianxin Zhong

  • Institute for Quantum Engineering and Micro-Nano Energy Technology and Department of Physics, Xiangtan University, Xiangtan 411105, China

  • *chenyp@xtu.edu.cn

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Issue

Vol. 86, Iss. 19 — 15 November 2012

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