Spin transport in a superlattice silicene nanoribbon

Document Type : Full length research Paper

Author

Department of Physics, University of Zanjan, PO Box 45195–313, Zanjan, Iran

Abstract

In this article, we investigate the spin transport properties of a superlattice silicene nanoribbon connected to two semi-infinite metallic leads, in the tight-binding model and Green's function approach, and in the presence of disorder and electric and exchange fields. Our calculations show that the metal-semiconductor phase transition occurs, when a perpendicular electric field and/or disorder is applied to the system. Also by changing the steplike electric field, the width of the energy gap will be controlled. In addition, by applying the disorder such as vacancy and impurity, the conductance of the system decreases and its band gap increases. Namely, the band gap of the system can be tuned by varying the relevant parameters, such as disorder concentration, steplike electric field and exchange field strength.

Keywords

References

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Journal of Research on Many-body Systems
Volume 7, Issue 14
December 2017
Pages 89-98

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History

  • Receive Date: 21 May 2016
  • Revise Date: 02 March 2017
  • Accept Date: 24 April 2017

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