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

doi:10.1103/PhysRevB.72.115427

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 journal › Article › peer-review

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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 language	English
Article number	115427
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.72.115427
Publication status	Published - 2005 Sept 15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.72.115427

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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.",

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AU - Suzuki, T.

AU - Sharma, H. R.

AU - Nishimura, T.

AU - Shimoda, M.

AU - Yamauchi, Y.

AU - Tsai, A. P.

PY - 2005/9/15

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AB - 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.

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

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