AI Article Synopsis
- Crystalline and quasicrystalline forms of lead (Pb) are created by evaporating Pb onto a specific surface of a complex quasicrystal made of silver, indium, and ytterbium under ultra-high vacuum conditions.
- The growth of lead results in unique fivefold-twinned structures on top of quasicrystalline lead, which may have specific heights due to electron confinement effects.
- Additionally, the study investigates how C60 molecules interact with these lead structures, finding that their movement is restricted on the quasicrystalline Pb, leading to a chaotic arrangement, while the probability of C60 molecules sticking to the lead islands is nearly zero.
Article 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.
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| http://dx.doi.org/10.1063/1.4873596 | DOI Listing |
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