光感生镜像电流
Photo-Induced Image Current
摘要：
利用含时微扰理论研究了纳米金属团簇在离表面一定距离处产生光生像电流的可能性。我们揭示了被激发到像态的电子的波函数是局域在表面之外的，电流是在一个球壳中流动的，球壳的半径是球半径的几倍。利用分子动力学模拟方法对正二十面体金属团簇Li $_{13}$进行了优化，并利用密度泛函方法和径向薛定谔方程求解得到了其能带结构.迄今为止，尽管人们对像电子的特性进行了大量的研究，但还没有对像电子进行光感应电流的研究。
英文摘要：
We study the possibility of the generation of the photo-induced image currents at a distance from the surface of nano-sized metal clusters by using time-dependent perturbation theory. We reveal that the wave function of an electron excited to the image state is localized outside the surface and current flows in a spherical shell whose radius is a few times the radius of the sphere. Spin polarized light has been applied to a perfect icosahedral metal cluster Li$_{13}$ whose optimization is achieved by molecular dynamic simulation and band structure is obtained by DFT method and by solution of radial Schrödinger equation. Up to our knowledge, despite the great effort on their characteristics, image electrons have not been the subject of the studies on photo-induced current.
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