标题： 激子玻色极化子的莫特转变 显示英文标题

标题： Mott transition in excitonic Bose polarons

摘要： 对于正负电荷的中性体系（例如晶体中的原子），增加密度会导致束缚电子向自由电子的莫特转变。 光学产生的电子 - 空穴系统的密度可以通过光学激发功率来原位控制，这使得随着密度的增加，从电子 - 空穴束缚态（激子）到自由电子和空穴的莫特转变成为可能。 这些莫特转变发生在相同类型的粒子对系统中，例如原子或激子。 然而，玻色极化子存在一种不同类型的莫特转变。 玻色极化子是在另一种粒子的玻色气体中的一种可移动粒子。 对于极化子中的莫特转变，随着周围气体密度的增加，极化子态会消失。 本文中，我们展示了这种类型的莫特转变的观测结果，并测量了二维激子玻色极化子的莫特转变参数$n_{\rm M}^{1/2} a_{\rm B}$。 显示英文摘要

摘要： For a neutral system of positive and negative charges, such as atoms in a crystal, increasing the density causes the Mott transition from bound electrons to free electrons. The density of optically generated electron-hole systems can be controlled in situ by the power of optical excitation that enables the Mott transition from excitons, the bound pairs of electrons and holes, to free electrons and holes with increasing density. These Mott transitions occur in systems of pairs of the same kind, such as atoms or excitons. However, a different type of the Mott transition can occur for Bose polarons. A Bose polaron is a mobile particle of one kind in a Bose gas of particles of another kind. For the Mott transition in polarons, the polaron states vanish with increasing density of the surrounding gas. In this paper, we present the observation of this type of the Mott transition and the measurement of the Mott transition parameter $n_{\rm M}^{1/2} a_{\rm B}$ in 2D excitonic Bose polarons.