SEMICONDUCTOR PHYSICS

First-principles study on transport properties of zigzag graphene nanoribbon with different spin-configurations

An Liping and Liu Nianhua

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Abstract: The current-voltage (I-V) characteristics and the transmission spectrums of zigzag graphene nanoribbon with different spin-configurations are investigated by using the first-principles calculations. It is shown that the current-voltage curves and the transmission spectrums strongly depend on the spin-configurations of the two sides of the ribbon. For the spin-parallel configuration structure, the curve is linear under lower bias voltage; For the spin-antiparallel configuration structure, there is a strong spin-polarization-dependent transmission which implies the ribbon can be used as a spin filter; while for other spin-configurations structures, the curve has the characteristic of semiconductor. It is found that there is a large magneto-resistance(MR) when the bias voltage is small. The impurity in the central scattering region significantly influences the spin-dependent current and the spin filter efficiency, which may lead the large MR to disappear.

Key words: graphene nanoribbon electronic transport first-principles

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    Received: Revised: 03 October 2010 Online: Published: 01 May 2011

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      An Liping, Liu Nianhua. First-principles study on transport properties of zigzag graphene nanoribbon with different spin-configurations[J]. Journal of Semiconductors, 2011, 32(5): 052001. doi: 10.1088/1674-4926/32/5/052001 An L P, Liu N H. First-principles study on transport properties of zigzag graphene nanoribbon with different spin-configurations[J]. J. Semicond., 2011, 32(5): 052001. doi: 10.1088/1674-4926/32/5/052001.Export: BibTex EndNote
      Citation:
      An Liping, Liu Nianhua. First-principles study on transport properties of zigzag graphene nanoribbon with different spin-configurations[J]. Journal of Semiconductors, 2011, 32(5): 052001. doi: 10.1088/1674-4926/32/5/052001

      An L P, Liu N H. First-principles study on transport properties of zigzag graphene nanoribbon with different spin-configurations[J]. J. Semicond., 2011, 32(5): 052001. doi: 10.1088/1674-4926/32/5/052001.
      Export: BibTex EndNote

      First-principles study on transport properties of zigzag graphene nanoribbon with different spin-configurations

      doi: 10.1088/1674-4926/32/5/052001
      • Accepted Date: 2010-10-03
      • Revised Date: 2010-10-03
      • Published Date: 2011-04-21

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