• 文献标题:   Quantum Hall effect in graphene with interface-induced spin-orbit coupling
  • 文献类型:   Article
  • 作  者:   CYSNE TP, GARCIA JH, ROCHA AR, RAPPOPORT TG
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Univ Fed Rio de Janeiro
  • 被引频次:   5
  • DOI:   10.1103/PhysRevB.97.085413
  • 出版年:   2018

▎ 摘  要

We consider an effective model for graphene with interface-induced spin-orbit coupling and calculate the quantum Hall effect in the low-energy limit. We perform a systematic analysis of the contribution of the different terms of the effective Hamiltonian to the quantum Hall effect (QHE). By analyzing the spin splitting of the quantum Hall states as a function of magnetic field and gate voltage, we obtain different scaling laws that can be used to characterize the spin-orbit coupling in experiments. Furthermore, we employ a real-space quantum transport approach to calculate the quantum Hall conductivity and investigate the robustness of the QHE to disorder introduced by hydrogen impurities. For that purpose, we combine first-principles calculations and a genetic algorithm strategy to obtain a graphene-only Hamiltonian that models the impurity.