Bilayer graphene has been predicted to host a moiré miniband with flat dispersion if the layers are stacked at specific twist angles known as the ’magic angles’1,2. Recently, twisted bilayer graphene (tBLG) with a magic angle twist was reported to exhibit a correlated insulating state and...
Twisted two-dimensional materials (t2DMs) such as graphene and black phosphorus are transforming the field of photonics, serving as a promising platform for the development of advanced devices that manipulate light. These materials possess multiple photonic properties that are determined by their twist ...
(AFM) image of an area zoomed in Fig.1a. It can be clearly seen that the surfaces of both MoS2and graphene substrate are clean and free of contaminations. The height of as-grown MoS2triangle domains is∼0.855 nm, corresponding a monolayer thickness20,21. Raman and photoluminescence (...
The electronic band structure of twisted bilayer graphene develops van Hove singularities whose energy depends on the twist angle between the two layers. Using Raman spectroscopy, we monitor the evolution of the electronic band structure... S Huang,M Yankowitz,K Chattrakun,... - 《Scientific Repor...
Although the zero-bandgap EBS of graphene limits its applications in electronic devices, it gives graphene excellent optical properties. From the perspective of the physical mechanisms, as the twist angles change, the energy difference ΔEVHS between VHS in TwBLGs also changes, so the EBS of TwB...
Raman spectroscopyphonon anharmonicityThe emerging moiré superstructure of twisted transition metal dichalcogenides (TMDs) leads to various correlated electronic and optical properties compared to those of twisted bilayer graphene. In such a versatile architecture, phonons can also be renormalized and evolve...
Optical responses of twisted bilayer graphene at targeted wavelengths can be amplified by leveraging energy levels of van Hove singularities (VHS) via tuning periods of moir茅 superlattices. Therefore, precise control of twist angles as well as the moir茅 superlattices is necessary for fabricating ...
Bilayer graphene (BLG) grown via chemical vapor deposition (CVD) tends to exhibit twisted stacking. The twist angle θt in twisted BLG (tBLG) provides a new degree of freedom for engineering its electronic and optical properties. In this paper, we investigate the θt-dependent opt...
The electrical and optical properties of twisted bilayer graphene (tBLG) depend sensitively on the twist angle. To study the angle dependent properties of the tBLG, currently it is required fabrication of a large number of samples with systematically varied twist angles. Here, we demonstrate the...
Sulfur-dopingFerromagnetismThe existence of low temperature ferromagnetism in twisted graphene systems and locally twisted-sublattices of highly-oriented-pyrolytic-graphite (HOPG) has recently attracted significant attention. Despite important progress, additional investigations are needed to evaluate the role ...