论文标题
单层WSE $ _2 $中的六角形和牛cit子
Hexcitons and oxcitons in monolayer WSe$_2$
论文作者
论文摘要
在原型单层半导体WSE $ _2 $中，传导条带中自旋偏振阀（低能的袋）的独特订购允许研究不仅可以研究简单的中性激子和带电的激子（即Trions），而且还可以研究更高的电子浓度，这些状态更加复杂。我们讨论了富含电子的WSE $ _2 $单层的磁光测量值，并将高电子掺杂以6体激子状态（“ Hexcitons”）和8型激子激子（“ Oxcitons”）的光学转变解释为光谱线。当光激发电子孔对与多个费米海洋同时相互作用时，这些多体状态出现了，每个孔都具有可区分的旋转和山谷量子数。此外，我们确定了光致发光光谱中六角子的原代和卫星光学跃迁的能量。
In the archetypal monolayer semiconductor WSe$_2$, the distinct ordering of spin-polarized valleys (low-energy pockets) in the conduction band allows for studies of not only simple neutral excitons and charged excitons (i.e., trions), but also more complex many-body states that are predicted at higher electron densities. We discuss magneto-optical measurements of electron-rich WSe$_2$ monolayers, and interpret the spectral lines that emerge at high electron doping as optical transitions of 6-body exciton states ("hexcitons") and 8-body exciton states ("oxcitons"). These many-body states emerge when a photoexcited electron-hole pair interacts simultaneously with multiple Fermi seas, each having distinguishable spin and valley quantum numbers. In addition, we identify the energies of primary and satellite optical transitions of hexcitons in the photoluminescence spectrum.
