  Thanks to their unique properties single-layer 2-D materials appear as
excellent candidates to extend Moore's scaling law beyond the currently
manufactured silicon FinFETs. However, the known 2-D semiconducting components,
essentially transition metal dichalcogenides, are still far from delivering the
expected performance. Based on a recent theoretical study that predicts the
existence of more than 1,800 exfoliable 2-D materials, we investigate here the
100 most promising contenders for logic applications. Their "current vs.
voltage" characteristics are simulated from first-principles, combining
density-functional theory and advanced quantum transport calculations. Both n-
and p-type configurations are considered, with gate lengths ranging from 15
down to 5 nm. From this unprecedented collection of electronic materials, we
identify 13 compounds with electron and hole currents potentially much higher
than in future Si FinFETs. The resulting database widely expands the design
space of 2-D transistors and provides original guidelines to the materials and
device engineering community.
