Formation of a stable deacagonal quasicrystalline Al-Pd-Mn surface layer

Details Formation of a stable deacagonal quasicrystalline Al-Pd-Mn surface layer Formation of a stable deacagonal quasicrystalline Al-Pd-Mn surface layer

2001-07-19

arxiv.org/abs/cond-mat/0107400v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Submitted to Phys. Ref. Lett. (18 July 2001)

Scientific paper

10.1103/PhysRevLett.87.195506

We report the in situ formation of an ordered equilibrium decagonal Al-Pd-Mn quasicrystal overlayer on the 5-fold 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.

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