Formation of a stable decagonal quasicrystalline Al-Pd-Mn surface layer.
We report the in situ formation of an ordered equilibrium decagonal Al-Pd-Mn quasicrystal overlayer on the fivefold symmetric surface of an icosahedral Al-Pd-Mn monograin. The decagonal structure of the epilayer is evidenced by x-ray photoelectron diffraction, low-energy electron diffraction, and electron backscatter diffraction. This overlayer is also characterized by a reduced density of states near the Fermi edge as expected for quasicrystals. This is the first time that a millimeter-size surface of the stable decagonal Al-Pd-Mn is obtained, studied, and compared to its icosahedral counterpart.
Naumović
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Institut de Physique, Université de Fribourg, Pérolles, CH-1700 Fribourg, Switzerland.
Aebi
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Schlapbach
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Beeli
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C
Kunze
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K
Lograsso
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Delaney
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