Reinterpretation of the scanning tunneling microscopy images of Si(100)-(2×1) dimers
Reinterpretation of the scanning tunneling microscopy images of Si(100)-(2×1) dimers
复制标题
Si(100)-(2×1)二聚体扫描隧道显微镜图像的重新解释
DOI：
10.1103/physrevb.60.8164
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发表时间：
1999
影响因子：
3.7
通讯作者：
H. Shigekawa
中科院分区：
文献类型：
--
作者：
K. Hata;S. Yasuda;H. Shigekawa
我们重温并提炼了扫描隧道显微镜的解释~STM！Si~100的图像！二聚体，基于一组广泛的STM观察结果，在低温~80K！以及Si~100的总能量计算！表面。该解释解决了一些悬而未决的问题，并使许多实验和理论研究达成一致意见。结果表明，在通常的隧穿条件下，表面共振和体态的隧穿对STM图像有很大的贡献。在空态下，来自这些态的隧穿压倒了来自局域p*表面态的隧穿，通常认为STM可以观察到这种情况。@S0163-1829~99 05935-4#
We revisit and refine the interpretation of the scanning tunneling microscopy ~STM! images of the Si ~100! dimers, based on results from an extensive set of STM observations carried out at low temperature ~80 K! and total-energy calculations of Si ~100! surfaces. The interpretation addresses some unresolved questions and brings much experimental and theoretical research into unanimous agreement. We show that tunneling from surface resonances and bulk states seriously contributes to the STM images within usual tunneling conditions. In the empty state, tunneling from these states overwhelms tunneling from the localized p* surface state, which STM is generally believed to observe. @S0163-1829 ~99!05935-4#