论文标题
过渡金属二核苷元中电子和激子的静电Moiré电位和双色超晶格的干扰
Interferences of electrostatic moiré potentials and bichromatic superlattices of electrons and excitons in transition metal dichalcogenides
论文作者
论文摘要
最近的实验进展表明，电子和激子Moiré超晶格在过渡金属二核苷（TMDS）中具有量子多体模拟和量子光学应用的巨大潜力。在这里，我们揭示了TMDS异质结构中的Moiré潜在景观具有静电来源，这些静电起源是从自发性电荷转移跨越原子注册中心的。这允许通过多层中独立配置的HeteroInterfaces的Moiré电位的干扰来设计可调的多晶格超级晶格。我们展示了MX2/M'x'2/MX2 Trilayers中山谷电子，孔和层间三位体的双重Moiré电位的示例，可以将其从多轨周期性超级晶格转变为Quasi-Periodiciendiendiendiscientibilly的景观。 TrilayerMoiré还设有两个具有相反电偶极子的中性激子的独立配置的三角形超级晶格。这些发现极大地丰富了TMDSMoiré作为量子模拟平台的多功能性和可控性。
Recent experimental progresses have demonstrated the great potential of electronic and excitonic moiré superlattices in transition metal dichalcogenides (TMDs) for quantum many-body simulations and quantum optics applications. Here we reveal that the moiré potential landscapes in the TMDs heterostructures have an electrostatic origin from the spontaneous charge transfer across the heterointerfaces dependent on the atomic registry. This allows engineering tunable multi-chromatic superlattices through the interference of moiré potentials from independently configurable heterointerfaces in multilayers. We show examples of bichromatic moiré potentials for valley electrons, holes, and interlayer trions in MX2/M'X'2/MX2 trilayers, which can be strain switched from multi-orbital periodic superlattices to quasi-periodic disordered landscape. The trilayer moiré also hosts two independently configurable triangular superlattices of neutral excitons with opposite electric dipoles. These findings greatly enrich the versatility and controllability of TMDs moiré as a quantum simulation platform.
