Electronic Transport through a Graphene Nanoribbon Composed of Nanoribbons of Different Widths


Based on non-equilibrium Green’s function method combined with the density functional theory, we have studied the electronic properties of a graphene nanoribbon (GNR) which is composed of two GNRs with different widths. The results show that the electron transmission is greatly modulated by the applied bias. The current of the system displays negative differential resistance effect, which is attributed to the broadening of the transmission gap with the increase of the bias around the Fermi level.

Share and Cite:

Liu, W. , Cheng, J. , Zhao, J. and Liu, D. (2015) Electronic Transport through a Graphene Nanoribbon Composed of Nanoribbons of Different Widths. Journal of Modern Physics, 6, 95-100. doi: 10.4236/jmp.2015.62012.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Liu, Y.L., Deng, X.Q. and Duan, X.C. (2013) Physica E, 52, 21-26.
[2] Li, P.W., Yang, Z., Zhang, W.D. and Xiong, S.J. (2013) Journal of Molecular Structure, 1038, 1-7.
[3] Han, M.Y., Ozyilmaz, B., Zhang, Y.B. and Kim, P. (2007) Physical Review Letters, 98, Article ID: 206805
[4] Morozov, S.V., Novoselov, K.S. and Katsnelson, M.I. (2008) Physical Review Letters, 100, 016602-016604.
[5] Geim, A.K. and Novoselov, K.S. (2007) Nature Materials, 6, 183-191.
[6] Zhang, Y.Y., Hu, J.P., Bernevig, B.A. and Wang, X.R. (2008) Physical Review B, 78, 155413-155418.
[7] Min, Y., Fang, H.J. and Dong, Z.C. (2013) Physica B, 430, 40-44.
[8] Min, Y., Fang, H.J. and Zhong, C.G. (2013) International Journal of Modern Physics B, 27, 1350081-1350086.
[9] Tang, G.P., Zhou, J.C., Zhang, Z.H., Deng, X.Q. and Fan, Z.Q. (2013) Carbon, 60, 94-101.
[10] Li, X.F., Wang, L.L., Chen, K.Q. and Luo, Y. (2012) Journal of Physics: Condensed Matter, 24, 095801-095805.
[11] Zou, W., Yu, Z.Z., Zhang, C.X., Zhong, J.X. and Sun, L.Z. (2012) Applied Physics Letters, 100, 103109-103111.
[12] Naumis, G.G., Terrones, M., Terrones, H. and Gaggero-Sager, L.M. (2009) Applied Physics Letters, 95, 182104-182106.

Copyright © 2022 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.