Crystalline and quasicrystalline allotropes of Pb formed on the fivefold surface of icosahedral Ag-In-Yb

H. R. Sharma, J. A. Smerdon, P. J. Nugent, A. Ribeiro, I. McLeod, V. R. Dhanak, M. Shimoda, Ampo Sai, R. McGrath

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Abstract

Crystalline and quasicrystalline allotropes of Pb are formed by evaporation on the fivefold surface of the icosahedral (i) Ag-In-Yb quasicrystal under ultra-high vacuum. Lead grows in three dimensional quasicrystalline order and subsequently forms fivefold-twinned islands with the fcc(111) surface orientation atop of the quasicrystalline Pb. The islands exhibit specific heights (magic heights), possibly due to the confinement of electrons in the islands. We also study the adsorption behavior of C60 on the two allotropes of Pb. Scanning tunneling microcopy reveals that a high corrugation of the quasicrystalline Pb limits the diffusion of the C60 molecules and thus produces a disordered film, similar to adsorption behavior of the same molecules on the clean substrate surface. However, the sticking coefficient of C60 molecules atop the Pb islands approaches zero, regardless of the overall C60 coverage.

Original languageEnglish
Article number174710
JournalJournal of Chemical Physics
Volume140
Issue number17
DOIs
Publication statusPublished - 2014 May 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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    Sharma, H. R., Smerdon, J. A., Nugent, P. J., Ribeiro, A., McLeod, I., Dhanak, V. R., Shimoda, M., Sai, A., & McGrath, R. (2014). Crystalline and quasicrystalline allotropes of Pb formed on the fivefold surface of icosahedral Ag-In-Yb. Journal of Chemical Physics, 140(17), [174710]. https://doi.org/10.1063/1.4873596