電子線を用いた準結晶の電子状態研究 : 準結晶の特徴は何か EELS Study of Electronic Structures of Quasicrystals and Approximant Crystals

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Al L-shell excitation spectra of Al-based quasicrystals of Al<SUB>75</SUB>Cu<SUB>15</SUB>V<SUB>10</SUB>, Al<SUB>73</SUB>Co<SUB>27</SUB> and Al<SUB>70</SUB>Pd<SUB>20</SUB>Mn<SUB>10</SUB> and related crystals were obtained from specified single crystalline areas by using a high energy-resolution electron energy-loss spectroscopy microscope. Intensity distributions of the spectra of not only the quasicrystalline materials but also related crystalline materials showed a presence of pseudogap at around the Fermi level. Onset energies of the spectra of the quasicrystals showed shifts to the higher energy side by 0.3 eV for Al<SUB>75</SUB>Cu<SUB>15</SUB>V<SUB>10</SUB> and Al<SUB>73</SUB>Co<SUB>27</SUB> and 0.8 eV for Al<SUB>70</SUB>Pd<SUB>20</SUB>Mn 10 compared to that of aluminum. Those results show that a decrease of valence charge at Al sites is characteristic for Al-based quasicrystalline materials. It may be attributed to an increase of covalency in bonding nature of the quasicrystalline materials.

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  • 日本結晶学会誌  

    日本結晶学会誌 49(1), 51-54, 2007-02-27 

    The Crystallographic Society of Japan

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各種コード

  • NII論文ID(NAID)
    10018571755
  • NII書誌ID(NCID)
    AN00188364
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    03694585
  • NDL 記事登録ID
    8717237
  • NDL 雑誌分類
    ZM46(科学技術--地球科学--岩石・鉱物・鉱床)
  • NDL 請求記号
    Z15-138
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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