title: Prediction of Quantum Anomalous Hall Insulator in half-fluorinated GaBi Honeycomb.
abstract: 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. 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.
authors: Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors: Sung-Ping
authors: SP
authors: Chen
authors: Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors: Zhi-Quan
authors: ZQ
authors: Huang
authors: Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors: Christian P
authors: CP
authors: Crisostomo
authors: Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors: Chia-Hsiu
authors: CH
authors: Hsu
authors: Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors: Feng-Chuan
authors: FC
authors: Chuang
authors: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore 117546.|Department of Physics, National University of Singapore, Singapore 117542.
authors: Hsin
authors: H
authors: Lin
authors: Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA.
authors: Arun
authors: A
authors: Bansil