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\bibitem{Chen_etal2020} {\textquotedblleft}\textit{PAI-graphene : a new topological semimetallic two-dimensional carbon allotrope with highly tunable anisotropic Dirac cones}{\textquotedblright}. Chen X, Bouhon A, Li L, Peeters FM, Sanyal B, Carbon \textbf{170}, 477 (2020).   http://doi.org/10.1016/J.CARBON.2020.08.012

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