Resonant Charge Transfer of Hydrogen Rydberg Atoms Incident on a Cu(100) Projected Band-Gap Surface.
Resonant Charge Transfer of Hydrogen Rydberg Atoms Incident on a Cu(100) Projected Band-Gap Surface.
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Cu(100) 投影带隙表面上氢里德伯原子入射的共振电荷转移。
DOI：
10.1103/physrevlett.115.093201
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发表时间：
2015
影响因子：
8.6
通讯作者：
Gibbard JA
中科院分区：
文献类型：
--
作者：
Gibbard JA
研究了氢里德伯原子入射到Cu（100）表面的电荷转移（电离）过程.与完全金属表面不同，其中里德伯电子能量与金属的导带退化，Cu（100）表面在这些能量下具有投影带隙，并且只有离散的图像状态可用，通过该图像状态可以发生电荷转移。共振增强的电荷转移观察到的里德堡态的能量匹配的图像状态之一，和集成的表面电离信号（信号与外加电场）显示出明确的周期性作为一个函数的能量进入和脱离共振的图像状态。表面电离动力学表现出速度依赖性;入射H原子的速度降低导致更大的平均电离距离和提取离子所需的较低场。“共振”值的表面电离曲线显示出随着速度的变化而变化的形状，反映了共振发生的有限场范围。
The charge transfer (ionization) of hydrogen Rydberg atoms () incident on a Cu(100) surface is investigated. Unlike fully metallic surfaces, where the Rydberg electron energy is degenerate with the conduction band of the metal, the Cu(100) surface has a projected band gap at these energies, and only discrete image states are available through which charge transfer can take place. Resonant enhancement of charge transfer is observed for Rydberg states whose energy matches one of the image states, and the integrated surface ionization signals (signal versus applied field) show clear periodicity as a function ofas the energies come in and out of resonance with the image states. The surface ionization dynamics show a velocity dependence; decreased velocity of the incident H atom leads to a greater mean distance of ionization and a lower field required to extract the ion. The surface ionization profiles for “on resonance”values show a changing shape as the velocity is changed, reflecting the finite field range over which resonance occurs.