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Surface structure of the 3x3-Si phase on Al(111), studied by the multiple usages of positron diffraction and core-level photoemission spectroscopy

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arxiv 2409.19666 v1 pith:6XECJI5H submitted 2024-09-29 cond-mat.mtrl-sci

Yusuke Sato , Yuki Fukaya , Akito Nakano , Takeo Hoshi , Chi-Cheng Lee , Kazuyoshi Yoshimi , Taisuke Ozaki , Takeru Nakashima
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Yasunobu Ando Hiroaki Aoyama Tadashi Abukawa Yuki Tsujikawa Masafumi Horio Masahito Niibe Fumio Komori Iwao Matsuda
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classification cond-mat.mtrl-sci
keywords core-leveldiffractionstructuresurfaceindicatedphotoemissionpositronspectroscopy
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The structure of an Al(111)3x3-Si surface was examined by combining data from positron diffraction and core-level photoemission spectroscopy. Analysis of the diffraction rocking curves indicated that the overlayer had a flat honeycomb lattice structure. Simulations of Si core-level spectra calculated via the first-principles indicated that one of the Si atoms in the unit cell was replaced by an Al atom. The surface superstructure was thus a two-dimensional layer of Al-embedded silicene on Al(111).

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