Phys.org November 17, 2024 Semiconductor Moiré superlattices provide a versatile platform to engineer quantum solids composed of artificial atoms on moiré sites. Previous studies have mostly focused on the simplest correlated quantum solid—the Fermi-Hubbard model—in which intra-atom interactions are simplified to a single onsite repulsion energy. An international team of researchers (USA – UC Berkeley, Lawrence Berkeley National Laboratory, MIT, University of Arizona, Japan) experimentally observed Wigner molecular crystals emerging from multielectron artificial atoms in twisted bilayer tungsten disulfide moiré superlattices. Using scanning tunneling microscopy, they demonstrated that Wigner molecules appeared in multielectron artificial atoms when Coulomb interactions dominated. The […]
Tag Archives: Moire superlattices
International team reports powerful tool for studying, tuning atomically thin materials
Phys.org June 15, 2023 Moiré superlattices of two-dimensional heterostructures arose as a new platform to investigate emergent behaviour in quantum solids with unprecedented tunability. To glean insights into the physics of these systems, it is paramount to discover new probes of the moiré potential and moiré minibands, as well as their dependence on external tuning parameters. Hydrostatic pressure is a powerful control parameter since it allows to continuously and reversibly enhance the moiré potential. An international team of researchers (USA – MIT, Mexico) used high pressure to tune the minibands in a rotationally aligned MoS2/WSe2 moiré heterostructure and showed that […]