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Transport Properties for Triangular Barriers in Graphene Nanoribbon

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Abstract

We theoretically study the electronic transport properties of Dirac fermions through one and double triangular barriers in graphene nanoribbon. Using the transfer matrix method, we determine the transmission, conductance and Fano factor. They are obtained to be various parameters dependent such as well width, barrier height and barrier width. Therefore, different discussions are given and comparison with the previous significant works is done. In particular, it is shown that at Dirac point the Dirac fermions always own a minimum conductance associated with a maximum Fano factor and change their behaviors in an oscillatory way (irregularly periodical tunneling peaks) when the potential of applied voltage is increased.

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Acknowledgements

The generous support provided by the Saudi Center for Theoretical Physics (SCTP) is highly appreciated by all authors. AJ thanks the Deanship of Scientific Research at King Faisal University for funding this research number (140232).

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Authors and Affiliations

  1. Theoretical Physics Group, Faculty of Sciences, Chouaïb Doukkali University, 24000, El Jadida, Morocco

    Abderrahim El Mouhafid & Ahmed Jellal

  2. Saudi Center for Theoretical Physics, Dhahran, Saudi Arabia

    Ahmed Jellal

  3. Physics Department, College of Sciences, King Faisal University, Alahssa, 31982, Saudi Arabia

    Ahmed Jellal

Authors
  1. Abderrahim El Mouhafid
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  2. Ahmed Jellal
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Correspondence to Ahmed Jellal.

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El Mouhafid, A., Jellal, A. Transport Properties for Triangular Barriers in Graphene Nanoribbon. J Low Temp Phys 173, 264–281 (2013). https://doi.org/10.1007/s10909-013-0918-2

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  • DOI: https://doi.org/10.1007/s10909-013-0918-2

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