[2P01-29] Poster session

[2P24] Structural and chemical characterization of boron overlayers on Zn-modified Cu(111)

*Tadayuki Yamasaki¹, Yuki Tsujikawa¹, Hiroshi Kondoh¹ (1. Graduate school of science and technology, Keio University (Japan))

Boron forms various surface structures depending on the substrate. On the Cu(111) surface, boron forms a long-range order of the √73 × √39 superstructure, recently identified as copper boride rather than borophene. While binary boron–metal surface compounds have been extensively studied, ternary systems remain largely unexplored. In this study, boron surface structures formed on a Zn-modified Cu(111) surface were investigated by electron diffraction and XPS. Most diffraction spots were identical to those of the reported copper boride, whereas additional streaks were observed only for the Zn-modified samples, suggesting the formation of an additional surface structure. XPS revealed that Zn desorbed during annealing and that the B 1s spectrum contained a minor component at 189–190 eV in addition to the main copper boride peak. These results suggest that the adsorption and desorption of Zn may lead to the formation of a new surface compound.

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