Abstract Twisted 2D bilayer materials are created by artificial stacking of two monolayer crystal networks with a desired twisting angle θ . The material forms moiré superlattice due to the periodicity both top and bottom layer structure. optical properties modified lattice reconstruction phonon renormalization, which makes spectroscopy an ideal characterization tool study novel physics phenome...

This article presents an overview of the evolution of technologies, standards, and deployment from second to fifth generation mobile networks with emphasis on current and future trends in the areas of wireless networking, multimedia technology, network architecture, and network services. Related research in the development of future mobile systems has been highlighted. Issues of system integrat...