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...
Alternating twist multilayer graphene (ATMG) has recently emerged as a family of moiré systems that share several fundamental properties with twisted bilayer graphene, and are expected to host similarly strong electron–electron interactions near the magic angle. Here, we study alternating twist quadri...
there is always an isolated Dirac band in the alternating-twist graphene system constructed by odd number of layers.Since each pair of flat bands can be perceived as the zeroth pseudo-Landau-levels in two dimensional Dirac fermions,electron in the flat band pair can feel a pseudo-magnetic ...
Gate-Tunable Topological Flat Bands in Trilayer Graphene-Boron Nitride Moir\\'e Superlattices We investigate the electronic structure of the flat bands induced by moir茅 superlattices and electric fields in nearly aligned ABC trilayer graphene-boron nitride interfaces where Coulomb effects can lead to ...
Interestingly, we found that a twist angle of 9.43° is sufficient to achieve the band flatness for β-As comparable to that of twist bilayer graphene at the magic angle of 1.08°. Moreover, we also find that the bandgap reduces with decreasing interlayer distance while the flat band is ...
The discovery of flat-band unconventional superconductivity and Mott insulating behavior in twisted graphene bilayers in 2018 was a groundbreaking and highly impactful development in condensed matter physics. It generated significant attention and excitement, sparking intense research into emergent quantum ...
However, a comprehensive understanding is lacking because the low-energy band structure strongly changes when an electric field is applied to vary the electron filling. Here, we gain direct access to the filling-dependent low-energy bands of twisted bilayer graphene (TBG) and twisted double bilayer...
Based on the effective continuum model,we study alternating-twist multilayer graphene system and emergence of magic angles and flat band topology.All the alternating-twist multilay... 查看全部>>doi:10.1016/j.jmst.2021.09.040Zhiyong LiuWenyuan Shi...
band engineering by twisting.Theoretical predictions followed by experimental realization of magic-angle bilayer graphene ignited the flame of investigation on the new freedom degree,twistangle,to adjust(opto)electrical behaviors.Then,the merging of Dirac cones and the presence of flat bands gave rise ...
Visualization of the flat electronic band in twisted bilayer graphene near the magic angle twistdoi:10.1038/S41567-020-0974-XM. Iqbal Bakti UtamaRoland J. KochKyunghoon LeeNicolas LeconteHongyuan LiSihan ZhaoLili JiangJiayi ZhuKenji Watanabe