Papers › Structure map of AB₂ type 2D materials by high-throughput DFT calculations
Structure map of AB₂ type 2D materials by high-throughput DFT calculations
Masahiro Fukuda, Jingning Zhang, Yung-Ting Lee, Taisuke Ozaki
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By high-throughput calculations based on the density functional theory, we construct a structure map for AB₂ type monolayers of 3844 compounds which are all the combinations of 62 elements selected from the periodic table. The structure map and its web version (www.openmx-square.org/2d-ab2/) provide comprehensive structural trends of the 3844 compounds in two dimensional (2D) structures, and predict correctly structures of most of existing 2D compounds such as transition metal dichalcogenides and MXenes having 1T or 1H type structures. We also summarize all the families of 1T/1H type AB₂ monolayers for each combination of groups in the periodic table on the basis of our structure map, and propose new types of structures such as a memory structure, which may be a candidate material for data storage applications with an extremely high areal density. In addition, planar and distorted planar structures and other geometrically characteristic structures are found through the high-throughput calculations. These characteristic structures might give new viewpoints and directions to search unknown 2D materials. Our structure map and database will promote efforts towards synthesizing undiscovered 2D materials experimentally and investigating properties of the new structures theoretically.
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