论文标题
单层Mose2中的地面和激发激发激元极性
Ground and Excited Exciton Polarons in Monolayer MoSe2
论文作者
论文摘要
单层过渡金属二进制二色剂半导体具有多功能实验性的激子物种，为研究激子与费米海洋指控之间的相互作用提供了一个有趣的平台。使用六角硼硝化硼封装的单层Mose2，我们研究了电荷密度调整对地面的影响，并激发了原子层中的Rydberg状态。与以前的研究相比，在A激子1S（a：1s）rydberg状态的光致发光和反射光谱中都揭示了一致的激发行为。 A：2S Rydberg State提供了一个机会，以大大减少激子结合能量来了解这种相互作用。我们发现费米海的影响变得更加戏剧化。使用光致发光上转换技术，我们进一步验证了B：2S激子的排斥分支的2S极性行为，其能量远高于裸露的带隙。我们的研究表明，二极管般的相互作用特征非常通用且高度健壮，为费米海中的许多体育状态提供了关键的见解。
Monolayer transition metal dichalcogenide semiconductors, with versatile experimentally accessible exciton species, offer an interesting platform for investigating the interaction between excitons and a Fermi sea of charges. Using hexagonal boron nitride encapsulated monolayer MoSe2, we study the impact of charge density tuning on the ground and excited Rydberg states in the atomic layer. Consistent excitonpolaron behavior is revealed in both photoluminescence and reflection spectra of the A exciton 1s (A:1s) Rydberg state, in contrast to previous studies. The A:2s Rydberg state provides an opportunity to understand such interactions with greatly reduced exciton binding energy. We found that the impact of the Fermi sea becomes much more dramatic. With a photoluminescence upconversion technique, we further verify the 2s polaron-like behavior for the repulsive branch of B:2s exciton whose energy is well above the bare bandgap. Our studies show that the polaron-like interaction features are quite generic and highly robust, offering key insights into the dressed manybody state in a Fermi sea.
