Asymmetric structure of germanene on an Al(111) surface studied by total-reflection high-energy positron diffraction

Yuki Fukaya, Iwao Matsuda, Baojie Feng, Izumi Mochizuki, Toshio Hyodo, Shin Ichi Shamoto

研究成果: Article同行評審

41 引文 斯高帕斯(Scopus)

摘要

The structure of germanene on an Al(111) surface has been experimentally investigated using the total-reflection high-energy positron diffraction (TRHEPD) method. The observed spot intensities are asymmetric, revealing no mirror symmetry in the atomic coordinates of germenene with respect to the 〈110〉 direction. Quantitative TRHEPD rocking curve analysis, based on dynamical diffraction theory, has revealed that the germanene layer has a 3×3 structure with asymmetrical buckling due to the protrusion of one of the Ge atoms in the unit cell, which is unlike the structural model proposed in previous studies. The magnitude of the buckling was found to be 0.94 A, and the spacing between the germanene and the Al(111) substrate to be 2.51 A. The new structure proposed in the present investigations, though different from that reported in studies before, does not contradict the other characteristics which were found experimentally in the previous studies.

原文English
文章編號035019
期刊2D Materials
3
發行號3
DOIs
出版狀態Published - 2016 9月 8

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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