论文标题
异形统治着魔法扭曲的石墨烯层中的平坦频带
Heterostrain rules the flat-bands in magic-angle twisted graphene layers
论文作者
论文摘要
扭曲的石墨烯双层的Moiré可以产生平坦的带，其中电荷载体没有足够的动能来逃避库仑相互作用，从而导致形成新颖的新型电子状态。这种非常丰富的物理学依赖于层之间的精确布置。我们的调查发布了扫描隧道显微镜（STM）测量值，以证明近乎魔法角度，天然异质膜，层之间的相对变形，在确定平面频段方面占主导地位。在大掺杂中，这证明了电子相关性的影响较弱，并且我们还表明尖端诱导的应变会产生强大的影响。在低掺杂的相反情况下，我们发现电子相关性进一步使扁平频带以很大的方式取决于实验细节。
The moiré of twisted graphene bilayers can generate flat bands in which charge carriers do not posses enough kinetic energy to escape Coulomb interactions with each other leading to the formation of novel strongly correlated electronic states. This exceptionally rich physics relies on the precise arrangement between the layers.We survey published Scanning Tunnelling Microscope (STM) measurements to prove that near the magic angle, native heterostrain, the relative deformations between the layers, dominates twist in determining the flat bands. This is demonstrated at large doping where electronic correlations have a weak effect and where we also show that tip-induced strain can have a strong influence. In the opposite situation of low doping, we find that electronic correlation further normalize the flat bands in a way that strongly depends on experimental details.
