513 / 2019-03-19 14:09:50

Ionization potential depression in warm dense matters

ionization potential depression, Green's function

全体主题 > Fundamental Physics at Extremes

The properties of a bound electron system immersed in a plasma environment are strongly modified by the surrounding plasma. A fundamental phenomenon among those modifications is ionization potential depression. Theoretical modeling of ionization potential depression and the related ionization equilibrium in dense plasmas, in particular in warm/hot dense matters, represents a significant challenge due to ionic coupling and electronic degeneracy effects. We present a quantum statistical model based on dynamical structure factors for the ionization potential depression, where quantum exchange and dynamical correlation effects in plasma environments are consistently and systematically considered in terms of the concept of self-energy. The ionization potential depression is calculated for different chemical elements under warm dense condition and compared to the experimental data as well as more phenomenological approaches used so far.