Publication date: Apr 03, 2019
Two-dimensional (2D) materials have emerged as promising candidates for next-generation electronic and optoelectronic applications. Yet, only a few dozens of 2D materials have been successfully synthesized or exfoliated. Here, we search for novel 2D materials that can be easily exfoliated from their parent compounds. Starting from 108423 unique, experimentally known three-dimensional compounds we identify a subset of 5619 that appear layered according to robust geometric and bonding criteria. High-throughput calculations using van-der-Waals density-functional theory, validated against experimental structural data and calculated random-phase-approximation binding energies, allow to identify 1825 compounds that are either easily or potentially exfoliable. In particular, the subset of 1036 easily exfoliable cases provides novel structural prototypes and simple ternary compounds as well as a large portfolio of materials to search from for optimal properties. For a subset of 258 compounds we explore vibrational, electronic, magnetic, and topological properties, identifying 56 ferromagnetic and antiferromagnetic systems, including half-metals and half-semiconductors. This archive entry contains the database of 2D materials (structural parameters, band structures, binding energies, phonons for the subset of the 258 easily exfoliable materials with less than 6 atoms, structures and binding energies for the remaining 1567 materials) together with the provenance of all data and calculations as stored by AiiDA.
|113.0 MiB||We provide 258 two-dimensional crystal structures (lattice vectors, atomic species and positions), exfoliated from three-dimensional experimental crystal structures. The structures were relaxed at the DFT-PBE level. Together with each structure, a set of materials properties is also given (at the DFT-PBE level): chemical formula, spacegroup, structural prototype, magnetic state, magnetization, band-gap, electronic bands, and phonon dispersions. In addition, we provide a table containing all the 1825 easily and potentially exfoliable materials and their 3D parents (with chemical formula, spacegroup, prototype, source database and ID, and binding energies), and the exfoliated 2D structure of 1567 of them which are either containing more than 6 atoms in the unit cell or are not easily exfoliable (i.e. those that are not present in the above set of 258 structures and hence, not relaxed).|
|751.1 MiB||Full database and its provenance, in the form of an AiiDA export file (generated with AiiDA v0.10.0rc3). Note that the ICSD initial structures are protected by copyright and were therefore not included.|
|14.7 KiB||Information on the licensing of the pseudopotential files distributed with this entry.|