关于Twisted Bilayer Graphene(TGB)的哈密顿量推导,可直接参看Bistritzer和MacDonald在PNAS上的原文。更详细的推导可以参照发表在Wiley Online Library上的Handbook of Graphene Set-Vol8-chapter6。(其第八卷第六章也即里斯本大学的G.Catarina的硕士毕业论文)。总得来说在写TGB的哈密顿量时,有两个关键的点,一是对...
Transport experiments in twisted bilayer graphene have revealed multiple superconducting domes separated by correlated insulating states. These properties are generally associated with strongly correlated states in a flat mini-band of the hexagonal moir茅 superlattice as was predicted by band structure ...
where \(a=0.246\) nm is the lattice constant of monolayer graphene3. The data presented below were collected in a region with a twist angle of 1.12°, over at least 30 moiré unit cells. The heterostrain in the region was estimated to be 0.2% following reference18. Each flat band in...
The bands of graphite are extremely sensitive to topological defects whichmodify the electronic structure. In this paper we found non-dispersive flatbands no farther than 10 meV of the Fermi energy in slightly twisted bilayergraphene as a signature of a transition from a parabolic dispersion of bil...
The discovery of superconductivity in twisted bilayer and trilayer graphene1–5 has generated tremendous interest. The key feature of these systems is an interplay between interlayer coupling and a moiré superlattice that gives rise to low-energy f
moiré bands, the system showed correlated states and superconductivity alternately, together with exotic magnetism and band topology. We also noted that these states were very sensitive to the quality of the device, i.e.accuracyand homogeneity of the twist angle between two sheets of graphene ...
Our results provide an essential microscopic insight into the flat band and its adjacent state for a full understanding of their electric field response in twisted graphene systems. 展开 DOI: 10.1039/D4NR02933J 年份: 2024 收藏 引用 批量引用 报错 分享 ...
The resulting quasiband structure is composed of the nearly flat bands with spiky peaks in the density of states, where the wave functions exhibit characteristic patterns which fit to the fractal inflations of the quasicrystal tiling. We also demonstrate that the 12-fold resonant states appear as...
When single layers of 2D materials are stacked on top of one another with a small twist in orientation, the resulting structure often involves incommensurate moiré patterns. In these patterns, the loss of angstrom-scale periodicity poses a significant t
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...