Recently, twisted bilayer graphene (tBLG) with a magic angle twist was reported to exhibit a correlated insulating state and superconductivity, where the presence of the flat miniband in the system is thought to be essential for the emergence of these ordered phases in the transport measurements....
In recent years, twisted bilayer (TB) graphene, especially magic-angle graphene, has become a fascinating material for advancing the field of twistronics. They provide an ideal platform for the investigation of superconductivity, Mott insulation state, quantum anomalous Hall effect, and quantum critic...
Recently, twisted bilayer graphene (tBLG) with a magic angle twist was reported to exhibit a correlated insulating state and superconductivity, where the presence of the flat miniband in the system is thought to be essential for the ... MIB Utama,RJ Koch,K Lee,... - 《Nature Physics》 ...
However, Golden says that the quantum wave equations Anderson used don’t work on the scale of these twisted bilayer composites, so there must be something else going on to create this conductor/insulator effect. “We observe a geometry-driven localization transition that has nothing to...
In elaborate computer simulations, the research team analyzed the quantum mechanical state of the new bilayer structure caused by these weak additional forces, and how this affects the vibrations of the atoms in the two layers. The angle of rotation matters ...
Density functional theory (DFT) calculations demonstrate that heteroatom Sn can tip the balance between 0°and 60°bilayers, facilitating the formation of the bilayer with a 60°stacking angle. The heteroatom-assisted approach provides a general strategy for the self-assembly of 2D materials. The ...
The electronic properties of this structure can be tuned by applying a perpendicular electric field, meaning that more details of the superconductivity can be explored than in twisted bilayer graphene. Both groups found evidence that the superconductivity is not created by the usual weak-coupling ...
High-temperature topological superconductivity in twisted double-layer copper oxides. Nat. Phys. https://doi.org/10.1038/s41567-020-01142-7 (2021) Article Google Scholar Wolf, T. et al. Spontaneous valley spirals in magnetically encapsulated twisted bilayer graphene. Phys. Rev. Lett. 126, ...
The list of known atomically thin materials like graphene is growing all the time. It already includes dozens of entries displaying a vast range of properties, from insulation to superconductivity, transparency to optical activity, brittleness to flexibility. The latest discovery provides a method for...
In twisted bilayer graphene, at certain twist angles, long-range periodicity associated with moiré patterns introduces flat electronic bands and highly localized electronic states, resulting in Mott insulating behaviour and superconductivity3,4. Theoretical studies suggest that these twist-induced phenomena ...