论文标题
莫特镇状态的充电顺序的光学签名
Optical signatures of charge order in a Mott-Wigner state
论文作者
论文摘要
托管巡回电子的二维半导体中的基本光激发具有吸引力和排斥极性 - 由电子动态筛选的激子。迄今已在翻译不变的退化费米系统中研究了激子 - 果龙。在这里，我们表明电子电荷顺序破坏了激子的翻译不变性，并导致激子 - 果态光谱中的直接光学特征。具体而言，我们证明了由于不可压缩的Mott State中的激子和电子之间的空间调制相互作用而出现了新的光学共振。我们的观察结果表明，谐振光谱谱为研究强相关状态（例如Wigner晶体和密度波）提供了宝贵的工具，其中激发量电子相互作用是通过新的电子电荷或自旋顺序的出现来修改的。
The elementary optical excitations in two dimensional semiconductors hosting itinerant electrons are attractive and repulsive polarons -- excitons that are dynamically screened by electrons. Exciton-polarons have hitherto been studied in translationally invariant degenerate Fermi systems. Here, we show that electronic charge order breaks the excitonic translational invariance and leads to a direct optical signature in the exciton-polaron spectrum. Specifically, we demonstrate that new optical resonances appear due to spatially modulated interaction between excitons and electrons in an incompressible Mott state. Our observations demonstrate that resonant optical spectroscopy provides an invaluable tool for studying strongly correlated states, such as Wigner crystals and density waves, where exciton-electron interactions are modified by the emergence of new electronic charge or spin order.
