A van der Waals bonded moiré bilayer formed by sequential growth of TiSe₂ and TiTe₂ monolayers exhibits emergent electronic structure as evidenced by angle-resolved photoemission band mapping. The two monolayers adopt the same lattice orientation but incommensurate lattice constants. Despite the lack of translational symmetry, sharp dispersive bands are observed. The dispersion relations appear distinct from those for the component monolayers alone. Theoretical calculations illustrate the formation of composite bands by coherent electronic coupling despite the weak interlayer bonding, which leads to band renormalization and energy shifts.

中文翻译：

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TiTe ₂ / TiSe ₂莫尔双层膜的相干电子能带结构

由TiSe ₂和TiTe ₂单层的连续生长形成的范德华键合的莫尔条纹双层表现出新兴的电子结构，如角度分辨的光发射谱带图所示。两个单层采用相同的晶格取向，但晶格常数不相称。尽管缺乏平移对称性，但观察到清晰的分散带。分散关系看起来与单独的组分单层的分散关系不同。理论计算表明，尽管层间键合较弱，但通过相干电子耦合形成了复合能带，这导致能带重新规范化和能量转移。