4 years ago

Role of Atomic Interaction in Electronic Hybridization in Two-Dimensional Ag2Ge Nanosheets

Role of Atomic Interaction in Electronic Hybridization in Two-Dimensional Ag2Ge Nanosheets
Xun Xu, Jianxin Zhong, Zhi Li, Yundan Liu, Jiaou Wang, Chen Liu, Jincheng Zhuang, Yi Du
We performed low-temperature scanning tunneling microscopy, low-energy electron diffraction, angle-resolved photoemission spectroscopy, and in situ Raman spectroscopy to investigate the exotic electronic characteristics of the two-dimensional Ag2Ge surface alloy associated with Ge–Ag interactions. The dynamics of Ge insertion into the Ag(111) substrate has been identified, which is distinct due to the metalloid nature of Ge. The ordered structure of the Ag2Ge alloy is determined by the Ag–Ge interaction, which can be controlled by the coverage of Ge atoms on the Ag(111) surface. The linear dispersions of surface states across the Fermi level have been identified in Ag2Ge by angle-resolved photoelectron spectroscopy, which suggests that Ag2Ge could be a potential candidate material for high-performance electronic applications.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b02017

DOI: 10.1021/acs.jpcc.7b02017

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