Electronic structure of the topmost tenfold surface of decagonal Al-Ni-Co quasicrystal

T. Suzuki, H. R. Sharma, T. Nishimura, M. Shimoda, Y. Yamauchi, A. P. Tsai

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    The electronic structure of the tenfold surface of a decagonal Al-Ni-Co quasicrystal was investigated using metastable He*(2S3,1s2s) deexcitation spectroscopy, which is extremely sensitive to the topmost surface. It was found that the density of states at the Fermi level was remarkably reduced at the topmost surface. The deexcitation of He* via a resonance transition followed by Auger neutralization observed on the quasicrystalline surface indicates the persistence of states within the pseudogap at the topmost surface. The similarity of the electronic structure between the topmost surface and the bulk is consistent with a bulk-terminated structure, as observed by low-energy ion scattering spectroscopy.

    Original languageEnglish
    Article number115427
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume72
    Issue number11
    DOIs
    Publication statusPublished - 2005 Sep 15

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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