论文标题
通过嵌入的kagome晶格在Zrb2上的外延二维GE层中出现（0001）
Emergence of Nearly Flat Bands through an Embedded Kagome Lattice in an Epitaxial Two-dimensional Ge Layer on ZrB2(0001)
论文作者
论文摘要
发现在GE（111）上生长的二吡啶二氮化锆薄膜上隔离的GE原子可以结晶成二维的Bitriangular结构，该结构最近被预测为平坦的带材料。角度分辨的光发射实验以及理论计算验证了尽管不可忽略的面内长距离跳跃和与基板的相互作用，但仍存在几乎平坦的条带。这提供了第一个实验证据，表明平坦带可以从原子之间的电子耦合而不是原子结构的几何形状中出现。
Ge atoms segregating on zirconium diboride thin films grown on Ge(111) were found to crystallize into a two-dimensional bitriangular structure which was recently predicted to be a flat band material. Angle-resolved photoemission experiments together with theoretical calculations verified the existence of a nearly flat band in spite of non-negligible in-plane long-range hopping and interactions with the substrate. This provides the first experimental evidence that a flat band can emerge from the electronic coupling between atoms and not from the geometry of the atomic structure.
