In two-dimensional heterostructures, crystalline atomic layers with differing lattice parameters can stack directly one on another. The resultant close proximity of atomic lattices with differing periodicity can lead to new phenomena. For umklapp processes, this opens the possibility for interlayer umklapp scattering, where interactions are mediated by the transfer of momenta to or from the lattice in the neighbouring layer. Using angle-resolved photoemission spectroscopy to study a graphene on InSe heterostructure, we present evidence that interlayer umklapp processes can cause hybridization between bands from neighbouring layers in regions of the Brillouin zone where bands from only one layer are expected, despite no evidence for Moiré-induced replica bands. This phenomenon manifests itself as ‘ghost’ anti-crossings in the InSe electronic dispersion. Applied to a range of suitable two-dimensional material pairs, this phenomenon of interlayer umklapp hybridization can be used t...

中文翻译：

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二维异质结构中条带的层间umklapp杂交引起的重影抗交叉

在二维异质结构中，具有不同晶格参数的晶体原子层可以直接彼此堆叠。所产生的周期性不同的原子晶格的紧密接近会导致新的现象。对于umklapp工艺，这为层间umklapp散射打开了可能性，其中相互作用是通过将动量传递到相邻层中的晶格或从相邻层中的晶格转移而介导的。使用角度分辨光发射光谱研究InSe异质结构上的石墨烯，我们提供的证据表明，层间umklapp过程可导致布里渊区中相邻层的谱带之间发生杂化，尽管只有莫里-诱导的复制带。这种现象在InSe电子分散体中表现为“重影”反交叉现象。应用于一系列合适的二维材料对，这种层间umklapp杂交现象可用于...