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Fig. 7. (Color online) Topological phase diagram of Si2Bi2 in the parameter space of the in-plane strain fields. Green, red, and blue area represent three phases of conductor (C), topological insulator (TI) and normal insulator (NI), respectively. The x- and y- directions indicate the zigzag and armchair directions.
New Phys.: Sae Mulli 2021;71:218~224