Prediction of flatness-driven quantum spin Hall effect in functionalized germanene and stanene.

@article{Zhang2016PredictionOF,
  title={Prediction of flatness-driven quantum spin Hall effect in functionalized germanene and stanene.},
  author={Run-wu Zhang and Wei-xiao Ji and Chang-wen Zhang and Ping Li and Pei-ji Wang},
  journal={Physical chemistry chemical physics : PCCP},
  year={2016},
  volume={18 40},
  pages={
          28134-28139
        }
}
Searching for realistic materials able to realize room-temperature quantum spin Hall (QSH) effects is currently a growing field, especially when compatibility with the current group-IV electronics industry is required. Here we predict, through first-principles calculations, a new class of QSH phases in flattened germanene and stanene functionalized with X atoms (f-GeX2 and f-SnX2; X = H, F, Cl, Br, I) with a bulk gap as large as 0.56 eV, that can be tuned efficiently under mechanical strain… 
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