论文标题
基于石墨烯的范德华结构中的互旋
Twistronics in graphene-based van der Waals structures
论文作者
论文摘要
范德华（VDW）结构的电子性能可以通过Moire Super晶格电位实质上改变，这在很大程度上取决于化合物之间的扭角。在扭曲的双层石墨烯（TBG）中，两个低能的范霍夫奇异性（VHSS）随着扭曲角的降低而靠近，最终以魔法角度（〜1.1度）变为高度非分散的平坦带。当费米水平位于魔法角度附近的TBG的平坦带中时，库仑相互作用应该超过电子的动能，这可以将系统驱动到各种强相关的相位。此外，在具有层间扭曲的其他基于石墨烯的VDW结构中也实现了平坦波段的强相关状态。在本文中，我们主要回顾了有关魔法角tbg（MATBG）和小角度扭曲的多层石墨烯的近期实验进步。最后，我们将对这一领域的看法。
The electronic properties of van der Waals (vdW) structures can be substantially modified by the moire superlattice potential, which strongly depends on the twist angle among the compounds. In twisted bilayer graphene (TBG), two low-energy Van Hove singularities (VHSs) move closer with decreasing twist angles and finally become highly non-dispersive flat bands at the magic angle (~ 1.1 degree). When the Fermi level lies within the flat bands of the TBG near the magic angle, Coulomb interaction is supposed to exceed the kinetic energy of the electrons, which can drive the system into various strongly correlated phases. Moreover, the strongly correlated states of flat bands are also realized in other graphene-based vdW structures with an interlayer twist. In this article, we mainly review the recent experimental advances on the strongly correlated physics of the magic-angle TBG (MATBG) and the small-angle twisted multilayer graphene. Lastly we will give out a perspective of this field.
