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- W2314907577 abstract "Recently, partially ionic boron (γ-B28) has been predicted and observed in pure boron, in bulk phase and controlled by pressure [Nature 2009, 457, 863]. By using ab initio evolutionary structure search, we report the prediction of ionic boron at a reduced dimension and ambient pressure, namely, the two-dimensional (2D) ionic boron. This 2D boron structure consists of graphene-like plane and B2 atom pairs with the P6/mmm space group and six atoms in the unit cell and has lower energy than the previously reported α-sheet structure and its analogues. Its dynamical and thermal stability are confirmed by the phonon-spectrum and ab initio molecular dynamics simulation. In addition, this phase exhibits double Dirac cones with massless Dirac Fermions due to the significant charge transfer between the graphene-like plane and B2 pair that enhances the energetic stability of the P6/mmm boron. A Fermi velocity (vf) as high as 2.3 × 106 m/s, which is even higher than that of graphene (0.82 × 106 m/s), is predicted for the P6/mmm boron. The present work is the first report of the 2D ionic boron at atmospheric pressure. The unique electronic structure renders the 2D ionic boron a promising 2D material for applications in nanoelectronics." @default.
- W2314907577 created "2016-06-24" @default.
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- W2314907577 date "2016-04-11" @default.
- W2314907577 modified "2023-10-07" @default.
- W2314907577 title "Graphene-like Two-Dimensional Ionic Boron with Double Dirac Cones at Ambient Condition" @default.
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- W2314907577 doi "https://doi.org/10.1021/acs.nanolett.5b05292" @default.
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