Lateral confinement of surface states on stepped Cu(111).
Lateral confinement of surface states on stepped Cu(111).
复制标题
阶梯状 Cu(111) 表面态的横向限制。
DOI：
10.1103/physrevb.52.7894
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
R. Miranda
中科院分区：
文献类型：
--
作者：
O. Sanchez;Jorge M. Garcia;P. Segovia;Jose Alvarez;A. L. V. Parga;José Ortega;M. Prietsch;R. Miranda
用扫描隧道显微镜观察了在邻近的铜表面上有规则分布的台阶对S类p表面态二维电子气的横向约束。局域扫描隧道谱显示，由于阶跃散射和梯级内的部分限制，表面态的结合能降低。用角分辨光电子能谱测量了几个邻近的铜表面的表面态能带底部的能量移动，发现与简单的一维Kronig-Penney模型是一致的。
By means of scanning tunneling microscopy we observe the lateral confinement of the two-dimensional electron gas of a s,p-like surface state by a regular distribution of steps on vicinal Cu(111). The surface state appears with a reduced binding energy as a result of scattering at steps and partial confinement within the terraces, as revealed by local scanning tunneling spectroscopy. The energy shift of the bottom of the surface state band is measured for several vicinal Cu surfaces with angle-resolved photoemission and found to be consistent with a simple one-dimensional Kronig-Penney model.