New research has uncovered the quantum potential of ultra-thin materials, offering a roadmap for creating novel forms of quantum matter by carefully stacking and twisting layers. Two studies published in the journal Science have compiled a catalog of nearly 9,000 two-dimensional materials—substances that are only one atom thick—many of which could be twisted to reveal new quantum states. These materials are of great interest because their unique properties can be harnessed for future technologies like quantum computing and advanced electronics. The first study expands a field known as topological quantum chemistry to include nonmagnetic two-dimensional materials. It identified 4,073 materials that have nontrivial topology, meaning their electronic structures have unique properties that could lead to new quantum behaviors. The researchers also mapped out the electronic band structures of these materials—essentially the energy levels that electrons can occupy—both for materials with and without these special topological properties. This creates a kind of "building block" library for scientists to use in their experiments. The second study focused on identifying materials with specific electronic structures that are ideal for twisting. It found 61 potential semimetals and 1,568 insulating materials that could be used in such experiments. These materials come in a variety of crystal structures and electron movement patterns, which makes them useful for simulating complex theoretical models like the Hubbard model, a key tool in understanding electron interactions in materials. Researchers have already managed to grow bulk crystals of several of these materials and have confirmed that some can be reduced to single atomic layers. This means the catalog not only provides a digital blueprint of possible materials but also a practical way to create physical samples in the lab. The shared database allows scientists to compare different materials and choose the best candidates for studying specific quantum phenomena. This approach makes it easier to explore how electrons behave collectively when layers are twisted and their electron density is controlled, opening up new possibilities in quantum physics.