• 文献标题:   High-temperature quantum anomalous Hall effect in honeycomb bilayer consisting of Au atoms and single-vacancy graphene
  • 文献类型:   Article
  • 作  者:   HAN Y, WAN JG, GE GX, SONG FQ, WANG GH
  • 作者关键词:  
  • 出版物名称:   SCIENTIFIC REPORTS
  • ISSN:   2045-2322
  • 通讯作者地址:   Nanjing Univ
  • 被引频次:   8
  • DOI:   10.1038/srep16843
  • 出版年:   2015

▎ 摘  要

The quantum anomalous Hall effect (QAHE) is predicted to be realized at high temperature in a honeycomb bilayer consisting of Au atoms and single-vacancy graphene (Au-2-SVG) based on the first-principles calculations. We demonstrate that the ferromagnetic state in the Au-2-SVG can be maintained up to 380 K. The combination of spatial inversion symmetry and the strong SOC introduced by the Au atoms causes a topologically nontrivial band gap as large as 36 meV and a QAHE state with Chern number C = -2. The analysis of the binding energy proved that the honeycomb bilayer is stable and feasible to be fabricated in experiment. The QAHEs in Ta-2-SVG and other TM2-SVGs are also discussed.