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arXiv 1709.09043cond-mat.mtrl-sci
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Au(111)表面高度有序二维锗的原子和电子结构研究

Investigation of the atomic and electronic structures of highly ordered two-dimensional germanium on Au(111)

W. Wang, R. I. G. Uhrberg

摘要:

利用低能电子衍射(LEED)、扫描隧道显微镜(STM)和光电子能谱学研究了Ge原子沉积在Au(111)表面形成的有序结构。在仔细分析STM图像和LEED图案的基础上,我们提出了一种新的Ge层原子结构的晶胞。芯能级数据表明,在室温下沉积后的退火过程中,一些Ge原子扩散到Au(111)晶体中。这进一步证实了角分辨光电子能谱学测量溅射和退火后剩余的不同量的锗。ARPES研究的结果清楚地排除了文献中将抛物带解释为锗烯狄拉克锥的一部分的解释。

英文摘要:

Low energy electron diffraction (LEED), scanning tunneling microscopy (STM), and photoelectron spectroscopy have been used to study an ordered structure formed by Ge atoms deposited onto the Au(111) surface. Based on a careful analysis of STM images and LEED patterns, we propose a new unit cell for the atomic structure of the Ge layer. Core level data indicate that some Ge atoms diffuse into the Au(111) crystal during annealing after deposition at room temperature. This is further corroborated by angle resolved photoelectron spectroscopy measured for different amounts of Ge remaining after sputtering and annealing. The results of the ARPES study clearly exclude the interpretation, in the literature, of a parabolic band as part of a Dirac cone of germanene.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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