Total energy distribution of field-emitted electrons from Al(100) surface with single-atom terminated protrusion
Total energy distribution of field-emitted electrons from Al(100) surface with single-atom terminated protrusion
复制标题
DOI：
10.1103/physrevlett.87.177601
复制
发表时间：
2001-10-22
影响因子：
8.6
通讯作者：
Watanabe, S
中科院分区：
文献类型：
--
作者：
Gohda, Y;Watanabe, S
采用密度泛函理论结合真实的空间散射理论，分析了Al（100）表面单原子终止突起的场致电子发射。我们已经得到了多个峰的总能量分布的发射电流从这样一个纯金属突起。此外，我们还发现，多个峰变得明显的突起的尺寸变得更大，这解释了实验之间的差异。上述结果可以从两个因素来理解，即最顶层Al原子的局域态的存在和最顶层原子前的势垒降低。
We have analyzed field electron emission from Al(100) surfaces with a single-atom terminated protrusion on the basis of the density functional theory combined with real space scattering theory. We have obtained multiple peaks in total energy distribution of emission current from such a pure-metallic protrusion. Furthermore, we have also found that multiple peaks become pronounced as the size of a protrusion becomes larger, which explains the discrepancy among experiments. All the above results can be understood from two factors, the existence of localized states at the topmost Al atom and the potential barrier reduction in front of the topmost atom.