Phys.org May 4, 2022
Using twisted bilayer graphene to make devices remains challenging because of the low yield of fabricating twisted bilayer graphene. Researchers at the University of Pennsylvania have shown how patterned, periodic deformations of a single layer of graphene transforms it into a material with electronic properties previously seen in twisted graphene bilayers. To better understand the quantum geometrical properties of this system, they set out to understand the theory underlying how electrons move in this single-layered system. After running computer simulations of single-layered experiments, the researchers were surprised to find new evidence of unexpected phenomena along the surface of the material but only along one side. One alternative to the complex twisted bilayer method is to use single layers of graphene that are placed onto a carefully patterned substrate which applies an external force, or strain, in a periodic fashion. Their work has the potential to create quantum devices such as orbital magnets and superconductors in the future…read more. TECHNICAL ARTICLEÂ
… This distortion generates currents that reside on only one side of the nanoribbon structure. Credit: Võ Tiến Phong Credit: Phys. Rev. Lett. 128, 176406, 29 April 2022Â