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“School of Nano-Sciences”

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Paper   IPM / Nano-Sciences / 11793
School of Nano Science
  Title:   Electronic Transport in Bi-Asymmetric T-Shaped Graphene Nanoribbons
  Author(s): 
1 . F. Khoeini
2 . Ali Asghar Shokri
  Status:   Published
  Journal: Journal of Computational and Theoretical Nanoscience
  No.:  4
  Vol.:  8
  Year:  2011
  Pages:   740-745
  Publisher(s):   American Scientific Publishers
  Supported by:  IPM
  Abstract:
In this work, we propose a peculiar T-shaped graphene nanoribbon (TGNR) that shows unusual transport properties. The calculations are based on the tight-binding model and Green's function method, in which transmission of the system is calculated in the coherent and linear response regime. We show two types of asymmetry in the system; geometric contacts in real-space and coupling energy in energy-space. Also, the effects of the TGNR width, and coupling energy on the transport properties are discussed. We compare the transport properties of two-terminal systems with three-terminal systems. Our numerical results show that for the three-terminal system, with decreasing coupling energy, transmission curve of the system oscillates around the Fermi energy. The structure we proposed can be useful for potential application in nanoelectronic devices.

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