Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/03

  • 研究者氏名
    Researcher Name

    藤田伸尚 Nobuhisa FUJITA
    講師 Lecturer
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門 金属機能設計研究分野
    Division of Inorganic Material Research, Metallurgical Design for Material Functions 
  • 研究キーワード
    Research Keywords

    Quasiperiodic tilings
    Structure analysis
    Quantum phenomena
Research Subject
Geometrical modeling of quasicrystals and structure-based studies on the stability and physical properties of quasicrystals

研究の背景 Background


Quasicrystals are solid-state materials that lack periodicity but maintain long-range order, and are often found as intermetallic compounds with appropriate compositions. Icosahedral quasicrystals in particular are understood as composed of icosahedrally symmetric clusters, which arrange themselves to form a quasiperiodic lattice. Geometrical study of quasiperiodic tilings plays an essential role in deciphering the structural properties of quasicrystals.

研究の目標 Outcome


My current goal is to elucidate the detailed structure of icosahedral quasicrystals by combining the mathematical studies of quasiperiodic tilings with crystallographic analyses of real materials, in view of that reliable knowledge on the structure is essential in understanding of their formation process as well as physical properties.

研究図Research Figure

Fig.1. Crystal structure of a new approximant phase to F-type icosahedral quasicrystal in Al69.4Pd22.3Cr2.2Fe6.1 alloy [1]. Fig.2. Non-equilibrium growth process of dodecagonal quasicrystal discovered in a mesoporous silica system is reproduced using a computer simulation [2]. Fig.3. Theoretical studies on quasiperiodic tilings in two- and three-dimensions (2009~, cf.[4]).

文献 / Publications

[1] N. Fujita, H. Takano, A. Yamamoto, and A.-P. Tsai, Acta Cryst. A 69, 322-340 (2013)
[2] C. Xiao, N. Fujita, K. Miyasaka, Y. Sakamoto, and O. Terasaki, Nature 487, 349-353 (2012)
[3] N. Fujita, S. Kikuchi and A.-P. Tsai, Solid State Sciences 13, 698-705 (2011)
[4] N. Fujita, Acta Cryst. A 65, 342-351 (2009).