Atomic structure of the alpha -Ga(001) surface investigated by scanning tunneling microscopy: Direct evidence for the existence of Ga2 molecules in solid gallium.
Atomic structure of the alpha -Ga(001) surface investigated by scanning tunneling microscopy: Direct evidence for the existence of Ga2 molecules in solid gallium.
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DOI：
10.1103/physrevb.46.7319
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发表时间：
1992-09
期刊：
影响因子：
--
通讯作者：
Züger;Dürig
中科院分区：
文献类型：
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作者：
Züger;Dürig
在超高真空条件下，利用扫描隧道显微镜（STM）研究了a-Ga单晶表面的（001）面。经过化学清洗的表面呈现出大的原子级平坦的阶地，其延伸距离达1000埃。在原子尺度上，STM图像揭示了表面晶格的1×1重建。测量到的（001）阶地之间的台阶高度为分子Ga 2二聚体的存在提供了直接证据，这是一个长期存在的假设，以前缺乏明确的实验证实
The (001) surface of a-Ga single-crystal surfaces was investigated with the scanning tunneling microscope (STM) under ultra-high-vacuum conditions. The sputter-cleaned surface exhibits large, atomically flat terraces extending over distances of several 1000 A. On the atomic scale, STM images reveal a 1×1 reconstruction of the surface lattice. The measured step height between the (001) terraces provides direct evidence for the existence of molecular Ga 2 dimers, a long-standing assumption that previously lacked clear experimental confirmation