Electron momentum distribution of decagonal Al72Ni12Co16 studied by compton scattering

Junpei Tamura Okada, Yasuhiro Watanabe, Yoshihiko Yokoyama, Nozomu Hiraoka, Masayoshi Itou, Yoshiharu Sakurai, Susumu Nanao

研究成果: Letter査読

5 被引用数 (Scopus)

抄録

The electron-momentum-density distributions (Compton profiles) in decagonal Al72Ni12Co16 have been measured along the [00002] and [11000] directions with a momentum resolution of 0.14 au. The experimental valence-electron profile is decomposed into two partial profiles: an inverted parabola-like profile and a broad Gaussian-like profile. By fitting the broad partial profile with a profile made up of atomic 3d wavefunctions, it is found that a considerable portion of the 3d-electron holes of Ni and Co are filled with electrons. The directionally averaged radius of the Fermi sphere is estimated from the number of electrons under the parabolic partial profile. The radius is larger than that of the inscribed sphere of the quasi-Brillouin zone. This leads to the Hume-Rothery mechanism does not play an important role in explaining the stability of the decagonal quasicrystal. Slight anisotropies of the Compton profile are observed.

本文言語English
ページ(範囲)L43-L48
ジャーナルJournal of Physics Condensed Matter
14
2
DOI
出版ステータスPublished - 2002 1 21
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学

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