Excited Rydberg states in MoSe 2 /WSe 2 heterostructures
Excited Rydberg states in MoSe 2 /WSe 2 heterostructures
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MoSe 2 /WSe 2 异质结构中的激发里德伯态
DOI：
10.1088/2053-1583/ac0296
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发表时间：
2021
期刊：
影响因子：
5.5
通讯作者：
Viner J
中科院分区：
文献类型：
--
作者：
Viner J
过渡金属二硫化物（TDM）和其他范德华固体中库仑相互作用的功能形式对于它们的许多独特性质至关重要，例如强相关电子态、超导性和涌现的铁磁性。本文介绍了 MoSe 2/WSe 2 异质结构中关键激子能级的测量。这些测量结果是通过仅在激子激发态观察到的特定拉曼峰的共振拉曼实验获得的。该数据用于验证这些结构中的库仑势模型，该模型预测激子能量在~ 5 meV之内。该模型用于确定异质结构形成对层的单粒子带隙的影响，并将在设计下一代更复杂的 TDM 结构中具有广泛的适用性。
The functional form of Coulomb interactions in the transition metal dichalcogenides (TDMs) and other van der Waals solids is critical to many of their unique properties, eg strongly-correlated electron states, superconductivity and emergent ferromagnetism. This paper presents measurements of key excitonic energy levels in MoSe 2/WSe 2 heterostructures. These measurements are obtained from resonance Raman experiments on specific Raman peaks only observed at excited states of the excitons. This data is used to validate a model of the Coulomb potential in these structures which predicts the exciton energies to within∼ 5 meV. This model is used to determine the effect of heterostructure formation on the single-particle band gaps of the layers and will have a wide applicability in designing the next generation of more complex TDM structures.