Coherent exciton-exciton interactions and exciton dynamics in a MoSe2/WSe2 heterostructure
Coherent exciton-exciton interactions and exciton dynamics in a MoSe2/WSe2 heterostructure
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DOI：
10.1103/physrevb.104.l241302
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发表时间：
2021-06
影响因子：
3.7
通讯作者：
Torben L Purz;Eric W. Martin;P. Rivera;William G. Holtzmann;Xiaodong Xu;S. Cundiff
中科院分区：
文献类型：
--
作者：
Torben L Purz;Eric W. Martin;P. Rivera;William G. Holtzmann;Xiaodong Xu;S. Cundiff
激子之间的相干耦合是多体相互作用的核心，过渡金属二硫族化物（TMD）异质结构是研究这些相互作用的新兴平台。我们在单层 MoSe2/WSe2 异质结构上采用多维相干光谱，观察单层 MoSe2 和 WSe2 中空间局域激子之间的相干耦合。通过多体光谱，我们进一步观察了自由层间电子空穴对产生的吸收态。该观察产生约 250 meV 的层间激子结合能的光谱测量。
Coherent coupling between excitons is at the heart of many-body interactions with transition metal dichalcogenide (TMD) heterostructures as an emergent platform for the investigation of these interactions. We employ multi-dimensional coherent spectroscopy on monolayer MoSe2/WSe2 heterostructures and observe coherent coupling between excitons spatially localized in monolayer MoSe2 and WSe2. Through many-body spectroscopy, we further observe the absorption state arising from free interlayer electron-hole pairs. This observation yields a spectroscopic measurement of the interlayer exciton binding energy of about 250 meV.