Resonant tunneling through double-barrier structures on graphene

doi:10.1088/1674-1056/23/1/017202

Abstract Quantum resonant tunneling behaviors of double-barrier structures on graphene are investigated under the tight-binding approximation. The Klein tunneling and resonant tunneling are demonstrated for the quasiparticles with energy close to the Dirac points. The Klein tunneling vanishes by increasing the height of the potential barriers to more than 300 meV. The Dirac transport properties continuously change to the Schrödinger ones. It is found that the peaks of resonant tunneling approximate to the eigen-levels of graphene nanoribbons under appropriate boundary conditions. A comparison between the zigzag- and armchair-edge barriers is given.

Keywords: graphene tight-binding approximation resonant tunneling

Received: 05 July 2013
Revised: 06 August 2013
Accepted manuscript online:

PACS:	72.80.Vp	(Electronic transport in graphene)
	73.23.Ad	(Ballistic transport)
	73.40.Gk	(Tunneling)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11004063) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2012ZZ0076).

Corresponding Authors: Deng Wen-Ji
E-mail: phwjdeng@scut.edu.cn

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Deng Wei-Yin (邓伟胤), Zhu Rui (朱瑞), Xiao Yun-Chang (肖运昌), Deng Wen-Ji (邓文基) Resonant tunneling through double-barrier structures on graphene 2014 Chin. Phys. B 23 017202

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