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Title: Prediction of Quantum Anomalous Hall Insulator in half-fluorinated GaBi Honeycomb

Using first-principles electronic structure calculations, we predict half-fluorinated GaBi honeycomb under tensile strain to harbor a quantum anomalous Hall (QAH) insulator phase. We show that this QAH phase is driven by a single inversion in the band structure at the Γ point. Moreover, we have computed the electronic spectrum of a half-fluorinated GaBi nanoribbon with zigzag edges, which shows that only one edge band crosses the Fermi level within the band gap. In conclusion, our results suggest that half-fluorination of the GaBi honeycomb under tensile strain could provide a new platform for developing novel spintronics devices based on the QAH effect.
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3]
  1. National Sun Yat-Sen University, Kaohsiuing (Taiwan). Dept. of Physics
  2. National Univ. of Singapore (Singapore). Centre for Advanced 2D Materials and Graphene Research Centre; National Univ. of Singapore (Singapore). Dept. of Physics
  3. Northeastern Univ., Boston, MA (United States). Dept. of Physics
Publication Date:
OSTI Identifier:
Grant/Contract Number:
SC0012575; FG02-07ER46352; AC02-05CH11231; NRF-NRFF2013-03; MOST-104-2112-M-110-002-MY3; MOST-103-2112-M- 110-008-MY3
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Temple University, Philadelphia, PA (United States); Northeastern Univ., Boston, MA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Center for Theoretical Sciences and the Ministry of Science and Technology of Taiwan
Country of Publication:
United States
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Electronic structure; Topological insulators