Science Daily October 30, 2021 Strain engineering is a powerful tool in designing artificial platforms for high-temperature excitonic quantum devices. An international team of researchers (USA – City College of New York, Germany, Japan) has created excitonic wires, essentially one-dimensional channels for excitons in what is otherwise a two-dimensional semiconductor by depositing the atomically thin 2D crystal on top of a microscopically small wire they created a small, elongated dent in the two-dimensional material, slightly pulling apart the atoms in the two-dimensional crystal and inducing strain in the material. For excitons, this dent is much like a pipe and once trapped […]
Tag Archives: Straintronics
Graphene “nano-origami” creates tiniest microchips yet
EurekAlert February 15, 2021 An international team of researchers (UK, Greece, USA – Rice University, Italy) identified and investigated different geometries of line defects in graphene and molybdenum disulfide such as standing collapsed wrinkles, folded wrinkles, and grain boundaries that exhibit distinct strain and doping. They determined the influence of the defects on local stiffness. For wrinkles of similar height, the stiffness of graphene was found to be higher than that of molybdenum disulfide by 10–15% due to stronger in-plane covalent bonding. Defects in graphene predominantly show compressive strain and increased carrier density. Defects in molybdenum disulfide predominantly show tensile […]