Alloying of Sn in the surface layer of Ag(111)
Alloying of Sn in the surface layer of Ag(111)
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DOI：
10.1103/physrevb.87.075441
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发表时间：
2013-02-26
影响因子：
3.7
通讯作者：
Uhrberg, R. I. G.
中科院分区：
文献类型：
--
作者：
Osiecki, Jacek R.;Uhrberg, R. I. G.
结果表明，1/3的单层锡与2/3层的银在银(111)面上形成了表面合金。这种高度有序的合金层显示出根3 x根3的结构。通过使用实验和理论工具(扫描隧道显微镜、角分辨光电子能谱、低能电子衍射和密度泛函理论)，得到了真实空间和倒易空间中再现实验电子结构的原子模型。为了验证该模型，对实验和理论获得的详细表面能带色散、恒定能量等值线和扫描隧道显微镜图像进行了比较。类似的，在银(111)面上与铅、铋或锑的1层厚的合金表现出可测量的自旋-轨道相互作用。然而，在本研究中，没有检测到锡的这种自旋分裂。DOI：10.1103/PhysRevB.87.075441
It is found that 1/3 monolayer (ML) of Sn forms a surface alloy with 2/3 ML of Ag on Ag(111). This highly ordered alloy layer shows a root 3 x root 3 structure. By employing experimental and theoretical tools (scanning tunneling microscopy [STM], angle resolved photoelectron spectroscopy, low-energy electron diffraction, and density functional theory), an atomic model has been obtained that reproduces the experimental electronic structure in both real and reciprocal space. Detailed surface band dispersions, constant energy contours, and STM images, obtained experimentally and theoretically, are compared in order to verify the model. Similar, 1-layer-thick alloys on Ag(111) with Pb, Bi, or Sb exhibit measurable spin-orbit interactions. However, no such spin split could be detected in the case of Sn in this study. DOI: 10.1103/PhysRevB.87.075441