论文标题
Mott-Moiré激子
Mott-moiré excitons
论文作者
论文摘要
我们在Moiré扭曲过渡金属二核苷（TMDS）中开发了一种受费米 - 哈伯物理学的激子的系统理论。具体而言，我们考虑了莫伊尔系统中的激子，价值频段是在莫特构成的制度中。这些“ Mott-Moiré激子”在扭曲的TMD Heterobilayers中可以实现，是价带中磁极的绑定状态，在传统带中是一个自由电子。我们发现在Hubbard Physics存在的情况下，激子带宽明显狭窄，是强相关性的潜在实验特征。我们还通过在莫伊尔时期的结合能，直径和带宽的依赖性来证明莫特 - 莫尔激子的高调性。我们的工作为未来探索扭曲的TMD杂词中强相关的激子的探索提供了指南。
We develop a systematic theory for excitons subject to Fermi-Hubbard physics in moiré twisted transition metal dichalcogenides (TMDs). Specifically, we consider excitons in moiré systems for which the valence band is in the Mott-insulating regime. These "Mott-moiré excitons", which are achievable in twisted TMD heterobilayers, are bound states of a magnetic polaron in the valence band and a free electron in the conduction band. We find significantly narrower exciton bandwidths in the presence of Hubbard physics, serving as a potential experimental signature of strong correlations. We also demonstrate the high tunability of Mott-moiré excitons through the dependence of their binding energies, diameters, and bandwidths on the moiré period. Our work provides guidelines for future exploration of strongly correlated excitons in twisted TMD heterobilayers.
