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Journal of Computational Electronics

, Volume 12, Issue 2, pp 85–93 | Cite as

Bandgap nanoengineering of graphene tunnel diodes and tunnel transistors to control the negative differential resistance

  • Viet Hung Nguyen
  • Jérôme Saint-Martin
  • Damien Querlioz
  • Fulvio Mazzamuto
  • Arnaud Bournel
  • Yann-Michel Niquet
  • Philippe Dollfus
Article

Abstract

By means of numerical simulation based on the Green’s function formalism on a tight binding Hamiltonian, we investigate different possibilities of achieving a strong effect of negative differential resistance in graphene tunnel diodes, the operation of which is controlled by the interband tunneling between both sides of the PN junction. We emphasize on different approaches of bandgap nanoengineering, in the form of nanoribbons (GNRs) or nanomeshes (GNMs), which can improve the device behaviour. In particular, by inserting a small or even zero bandgap section in the transition region separating the doped sides of the junction, the peak current and the peak-to-valley ratio (PVR) are shown to be strongly enhanced and weakly sensitive to the length fluctuations of the transition region, which is an important point regarding applications. The study is extended to the tunneling FET which offers the additional possibility of modulating the interband tunneling and the PVR. The overall work suggests the high potential of GNM lattices for designing high performance devices for either analog or digital applications.

Keywords

Graphene device Dirac fermions Green’s function Quantum transport Negative differential resistance Tunnel diode Tunnel transistor 

Notes

Acknowledgements

This work was partially supported by the French ANR through projects NANOSIM_GRAPHENE (ANR-09-NANO-016) and MIGRAQUEL (ANR-10-BLAN-0304). The work at Hanoi was supported by the Vietnamese National Foundation for Science and Technology Development (NAFOSTED) under Projects No. 103.02.64.09 and 103.02.76.09.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Viet Hung Nguyen
    • 1
    • 2
    • 3
  • Jérôme Saint-Martin
    • 1
  • Damien Querlioz
    • 1
  • Fulvio Mazzamuto
    • 1
  • Arnaud Bournel
    • 1
  • Yann-Michel Niquet
    • 3
  • Philippe Dollfus
    • 1
  1. 1.Institute of Fundamental Electronics (IEF), CNRS, UMR 8622Univ. Paris-SudOrsayFrance
  2. 2.Center for Computational Physics, Institute of PhysicsVietnam Academy of Science and TechnologyHanoiVietnam
  3. 3.L_Sim, SP2M, UMR-E CEA/UJF-Grenoble 1INACGrenobleFrance

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