Two-dimensional topological insulators with large bulk energy gap

Yang Z Q^{1, 2}, Jia Jin-Feng^{1, 2}, Qian Dong^{1, 2, †,}

Crystal structure and energy gap of stanene, from Ref. [17]. (a) Top and side views of stanene. (b) Top and side views of decorated stanene. (c) Energy gaps and topological properties of stanene and decorated stanene. Stanene has a bulk gap of ∼0.1 eV. After decoration, the bulk gap increases to ∼0.3 eV.