论文标题
双对准的石墨烯 - 甲状腺氮化硼结构
Kagomé network of chiral miniband-edge states in double-aligned graphene-hexagonal boron nitride structures
论文作者
论文摘要
互联网异质结构最近作为新的量子电子材料出现，其性能由相邻的二维材料之间的扭角确定。在这里，我们研究了在六角硼（HBN）中封装在石墨烯（G）中的Moiré超晶格小型班，并与顶部和底部HBN晶体都几乎完美排列。我们表明，对于HBN层的单位单元的这种取向，在局部打破了石墨烯晶格的反转对称性，HBN/G/HBN结构具有一个Kagomé的拓扑受保护的手chiral状态的网络，并具有在微型边缘附近的能量，并沿着各个区域沿着各个区域扩展了与不同的数字界数。
Twistronic heterostructures have recently emerged as a new class of quantum electronic materials with properties determined by the twist angle between the adjacent two-dimensional materials. Here we study moiré superlattice minibands in graphene (G) encapsulated in hexagonal boron nitride (hBN) with an almost perfect alignment with both the top and bottom hBN crystals. We show that, for such an orientation of the unit cells of the hBN layers that locally breaks inversion symmetry of the graphene lattice, the hBN/G/hBN structure features a Kagomé network of topologically protected chiral states with energies near the miniband edge, propagating along the lines separating the areas with different miniband Chern numbers.
