Science Daily  March 28, 2023 Moiré effects in vertical stacks of two-dimensional crystals give rise to new quantum materials with rich transport and optical phenomena that originate from modulations of atomic registries within moiré supercells. Due to finite elasticity, however, the superlattices can transform from moiré-type to periodically reconstructed patterns. An international team of researchers (Germany, Russia, Austria, Japan) expanded the notion of such nanoscale lattice reconstruction to the mesoscopic scale of laterally extended samples and demonstrated rich consequences in optical studies of excitons in MoSe2–WSe2 heterostructures with parallel and antiparallel alignments. According to the researchers their results provide a […]