Itinerant ferromagnetism in transition metal dichalcogenide moiré superlattices

Moir & ccaron;materials are artificial crystals formed at van der Waals heterojunctions that have emerged as a highly tunable platform that is able to realize much of the rich quantum physics of electrons in atomic scale solids, and in several cases even new quantum phases of matter. Here we use finite-size exact diagonalization methods to explore the physics of single-band itinerant electron ferromagnetism in semiconductor moir & ccaron; materials. We predict where ferromagnetism is likely to occur in triangular-lattice moir & ccaron; systems, and where it is likely to yield the highest Curie temperatures.