Surface Structure Investigation with Ion Scattering and Scanning Tunneling Microscopy at Oxygen and Nitrogen Covered CU3Au Surfaces
Surface Structure Investigation with Ion Scattering and Scanning Tunneling Microscopy at Oxygen and Nitrogen Covered CU3Au Surfaces
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使用离子散射和扫描隧道显微镜研究氧和氮覆盖的 CU3Au 表面的表面结构
DOI：
10.1007/978-3-642-80281-2_4
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
G. Comşa
中科院分区：
文献类型：
--
作者：
H. Niehus;M. Voetz;C. Achete;K. Morgenstern;G. Comşa
利用1800低能离子散射和中性粒子检测（NICISS）对清洁CU 3 Au（100）和（110）的研究表明，表面在室温下终止于富Au平面。清洁的Cu_3Au（100）表面显示出LEED c（2x2）超结构，并在超高真空中用扫描隧道显微镜（STM）以原子分辨率成像。在晶胞中测得的不同灰度高度可以分别归因于Au和Cu原子的位置。氮原子的吸附开始于岛的形成。从NICISS数据可以得出结论，在0或N饱和后，表面以Cu平面终止。在STM和直接反冲光谱（DRS）的基础上，研究了氧或氮的四重空心位。上述Cu原子在Cu_3Au（100）表面上的位置。Cu 3Au（110）的惰性较低，并且通过暴露于气体容易实现氧吸附。发现了与Cu（110）-（2x 1）0结构相似的附加行结构。
The investigation of clean CU3Au (100) and (110) with 1800 low energy ion scattering and detection of neutrals (NICISS) shows that the surface is terminated at room temperature with the Au rich plane. The clean CU3Au (100) surface exhibits a LEED c (2x2) superstructure and has been imaged by scanning tunneling microscopy (STM) in ultra high vacuum with atomic resolution. The measured different grey scale heights in the unit cell can be attributed to the position of Au and Cu atoms, respectively. Adsorption of atomic nitrogen starts with the formation of islands. Prom the NICISS data it has been concluded that after saturation with 0 or N the surfaces are terminated with a Cu plane. On the basis of STM and direct recoil spectroscopy (DRS) the fourfold hollow site of oxygen or nitrogen. above Cu atoms has been deduced for the CU3Au (100) surface. CU3Au (110) is less inert and oxygen adsorption is readily achieved by gas exposure. An added row structure similar to the structure discovered at Cu (110)-(2x1) 0 has been found.