One-dimensional versus two-dimensional electronic states in vicinal surfaces
One-dimensional versus two-dimensional electronic states in vicinal surfaces
复制标题
邻近表面中的一维与二维电子态
DOI：
10.1088/1367-2630/7/1/101
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发表时间：
2005
影响因子：
3.3
通讯作者：
Frederik Schiller
中科院分区：
文献类型：
--
作者：
J. Ortega;M. Ruiz;J. Cordón;A. Mugarza;J. Kuntze;Frederik Schiller
具有周期性台阶阵列的邻位表面是最简单的横向纳米结构。特别是，邻近（111）平面的贵金属表面是通过角光电发射探索一维超晶格中基本电子性质的优良测试系统。这些表面的特点是从自由电子的表面状态，分散在步骤边缘的强发射。因此，二维表面态显示超晶格能带折叠，并且取决于阶跃晶格常数d，其分裂成一维量子阱能级。在这里，我们使用高分辨率，角分辨光电发射来分析各种样品的表面状态，试图说明表面状态带的变化作为d的函数。
Vicinal surfaces with periodic arrays of steps are among the simplest lateral nanostructures. In particular, noble metal surfaces vicinal to the (1 1 1) plane are excellent test systems to explore the basic electronic properties in one-dimensional superlattices by means of angular photoemission. These surfaces are characterized by strong emissions from free-electron-like surface states that scatter at step edges. Thereby, the two-dimensional surface state displays superlattice band folding and, depending on the step lattice constant d, it splits into one-dimensional quantum well levels. Here we use high-resolution, angle-resolved photoemission to analyse surface states in a variety of samples, in trying to illustrate the changes in surface state bands as a function of d.