New catalogs explore quantum potential of thin materials

Recent advancements in the field of twistronics are highlighting the potential of atomically thin materials to revolutionize quantum matter. By manipulating the angles of stacked layers of materials such as twisted graphene and transition metal dichalcogenides, researchers are uncovering new electronic behaviors, including superconductivity and fractional Chern insulators. These developments are paving the way for the design of novel quantum states and simulators.

A recent study published in Nature demonstrates how altering the electronic structure through M-point twisting can lead to new physics. This approach could unlock quantum states and models beyond current capabilities. Two new papers published in Science on September 24 provide a comprehensive catalog of nearly 9,000 two-dimensional materials, identifying over 1,600 candidates suitable for twisting to create new quantum simulators.

The first study extends the theory of topological quantum chemistry to nonmagnetic two-dimensional materials, linking a crystal's chemistry and symmetries to its electronic topology. This research identified 4,073 materials with nontrivial topology or obstructed atomic limits, offering new opportunities to explore robust quantum behaviors and potential electronic devices.

The research team, led by B. Andrei Bernevig of Princeton University, has developed tools and databases to aid in the exploration of these materials. The Topological 2D Materials Database distinguishes between experimentally reported structures and computational candidates, providing a library of electronic band structures for further research.

The second study identifies semimetal and insulating candidates with electronic structures conducive to twisting, offering a pathway to study collective quantum behaviors. The researchers have already grown several promising materials, such as tin diselenide and hafnium disulfide, and confirmed their suitability for exfoliation to single layers.

This collaborative effort, involving institutions such as Princeton University, the Donostia International Physics Center, and the Max Planck Institute, aims to assemble these materials into devices to test their collective behaviors. The shared database allows researchers to compare electronic structures and select candidates for further study, enhancing the potential for discovering new quantum phenomena.