• 文献标题:   Local moment formation in bilayer graphene
  • 文献类型:   Article
  • 作  者:   MOHAMMADI Y, MORADIAN R
  • 作者关键词:   bilayer graphene, anderson impurity model, green s function, local moment
  • 出版物名称:   SOLID STATE COMMUNICATIONS
  • ISSN:   0038-1098 EI 1879-2766
  • 通讯作者地址:   Islamic Azad Univ
  • 被引频次:   8
  • DOI:   10.1016/j.ssc.2013.10.021
  • 出版年:   2014

▎ 摘  要

The local properties of bilayer graphene (BLG) due to the spatial inhomogeneity of its sublattices are of interest. We apply the Anderson impurity model to consider the local moment formation on a magnetic impurity which could be adsorbed on different sublattices of BLG. We find different features for the impurity magnetization when it is adsorbed A and B sublattices. The impurity adsorbed on A sublattice can magnetize even when the impurity level is above the Fermi level and the on-site coulomb energy is very small. But when the impurity is adsorbed on B sublattice the magnetization is possible for limited values of the impurity level and the on-site coulomb energy. This is due to different local density of the low energy states at A and B sublattices which originates from their spatial inhomogeneity. Also we show that electrical controlling of the magnetization of adatoms besides its inhomogeneity in BLG allows for possibility of using BLG in spintronics devices with higher possible application than SLG. (C) 2013 Elsevier Ltd. All rights reserved.