• 文献标题:   Investigation of electronic transport through a ladder-like graphene nanoribbon including random distributed impurities
  • 文献类型:   Article
  • 作  者:   ESMAILI E, MARDAANI M, RABANI H
  • 作者关键词:   tightbinding, green s function, ladderlike, nanoribbon, random disorder
  • 出版物名称:   SUPERLATTICES MICROSTRUCTURES
  • ISSN:   0749-6036
  • 通讯作者地址:   Shahrekord Univ
  • 被引频次:   0
  • DOI:   10.1016/j.spmi.2017.10.022
  • 出版年:   2018

▎ 摘  要

The electronic transport of a ladder-like graphene nanoribbon which the on-site or hopping energies of a small part of it can be random is modeled by using the Green's function technique within the nearest neighbor tight-binding approach. We employ a unitary transformation in order to convert the Hamiltonian of the nanoribbon to the Hamiltonian of a tight-binding ladder-like network. In this case, the disturbed part of the system includes the second neighbor hopping interactions. While, the converted Hamiltonian of each ideal part is equivalent to the Hamiltonian of two periodic on-site chains. Therefore, we can insert the self-energies of the alternative on-site tight-binding chains to the inverse of the Green's function matrix of the ladder-like part. In this viewpoint, the conductance is constructed from two trans and cis contributions. The results show that increasing the disorder strength causes the increase and decrease of the conductance of the trans and cis contributions, respectively. (C) 2017 Elsevier Ltd. All rights reserved.