论文标题
探测魔术角石墨烯中相关状态的波形
Probing the wavefunctions of correlated states in magic angle graphene
论文作者
论文摘要
使用扫描探针显微镜和光谱法，我们探索了扭曲的双层石墨烯的电子波函数的空间对称性，其“魔法角”为1.1度。这个小的扭曲角会导致长波长Moiré单位单元在13 nm的阶段和两个扁平带的外观。随着扭曲角的降低，相关效应会增加，直到以魔法角度最大化。在此角度，由于电荷有序状态的出现，电荷中性点处的波函数仅显示C2对称性。随着系统的掺杂，每次相应地填充莫伊尔单位细胞的对称性变化，指向旋转和山谷变性状态的相关性质。
Using scanning probe microscopy and spectroscopy, we explore the spatial symmetry of the electronic wavefunctions of twisted bilayer graphene at the "magic angle" of 1.1 degrees. This small twist angle leads to a long wavelength moiré unit cell on the order of 13 nm and the appearance of two flat bands. As the twist angle is decreased, correlation effects increase until they are maximized at the magic angle. At this angle, the wavefunctions at the charge neutrality point show only C2 symmetry due to the emergence of a charge ordered state. As the system is doped, the symmetry of the wavefunctions change at each commensurate filling of the moiré unit cell pointing to the correlated nature of the spin and valley degeneracy broken states.
