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- W4380481494 abstract "The quantum anomalous Hall (QAH) effect is rarely predicted in antiferromagnetic (AFM) materials. Here, by first-principles calculations, we propose that the monolayer of MoO is AFM and can be tuned to be a QAH insulator with a band gap of 50 meV. The MoO monolayer is a tetragonal lattice and we have checked its stability by the phonon spectrum and molecular dynamical simulation. It has a collinear AFM order with magnetic moments larger than $2phantom{rule{0.16em}{0ex}}{ensuremath{mu}}_{B}$ on each Mo atom. In the absence of strain, it is an AFM metal with a direct gap if spin-orbital coupling is considered. Tensile strain results in a metal-insulator phase transition, but it is still topologically trivial protected by an effective time-reversal symmetry. Shear strain breaks this symmetry and leads to the expected nontrivial electronic bands with Chern number $C=ensuremath{-}1$. In addition, its N'eel temperature could be larger than room temperature, providing another platform for the application of AFM materials in spintronic devices." @default.
- W4380481494 created "2023-06-14" @default.
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- W4380481494 date "2023-06-13" @default.
- W4380481494 modified "2023-10-17" @default.
- W4380481494 title "Quantum anomalous Hall effect in an antiferromagnetic monolayer of MoO" @default.
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- W4380481494 doi "https://doi.org/10.1103/physrevb.107.214419" @default.
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