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  • The research results were published in Phys. Rev. B.
    "Methods for constructing parameter-dependent flat-band lattices" [2021/5/13]
    For more details, please see here.

  • The research results were published in Phys. Rev. Materials.
    "Voltage-controlled magnetic anisotropy in antiferromagnetic MgO-capped MnPt films" [2021/5/11]
    For more details, please see here.

  • The research results were published in Phys. Rev. E.
    "Diverse densest binary sphere packings and phase diagram" [2021/2/19]
    For more details, please see here.

  • The research results were published in Chemistry A European Journal.
    "The Simplest Model for Doped Poly(3,4-ethylenedioxythiophene) (PEDOT): Single-crystalline EDOT Dimer Radical Cation Salts" [2021/1/11]
    For more details, please see here.

  • We welcome these two new members for M1.
    - Sokkyu An : from Yokohama National University
    - Kyohei Tsukamoto : from Kyushu University

  • Toshikata Ogata and Ryotaro Koshoji have completed the Master's Course of the Graduate School of Science at the University of Tokyo.
    Toshitaka Ogata - 2019/4-2021/3, employment
    Proposal for construction of flat-band lattices by site removal and site addition
    Ryotaro Koshoji - 2019/4-2021/3, Doctor's course
    Densest sphere packings and phase diagram

  • Ozaki Lab. welcomed 3 students who attended UTokyo Kashiwa Campus Science Camp (KSC2021).

    Kazuki Hirota - freshman, Faculty of Science I
    Nagi Atsuchi - freshman, Faculty of Science I
    Ritaro Sato - freshman, Faculty of Science II

    ※The purpose of this program was that students intensively experience the "field of intellectual adventure" at the Advanced Research Department of the University of Tokyo Kashiwa Campus for four days as a winter program, and to gain basic training as a future researcher. In addition to the solid state physics course, 7 courses were offered on the themes of Industrial Sceince, Life, Energy and Materials, Cosmic, Atmosphere and Ocean, and Environment systmes.
    For more details, please see here.

  • Ternary nanoclusters composed of rare metal atoms are expected as NOx reduction catalysts and are being actively studied experimentally. However, the details of the physical factors that govern the structure of nanoclusters have not been clarified. This time, we analyzed the structural properties of the ternary PdRuM (M = Pt, Rh, Ir) nanoclusters (about 55 atoms) in detail using first-principles calculation and Monte Carlo method. We figured out that in the case of naked clusters, Pd atoms with low surface energy are near the surface and tend to be located at the top of nanoclusters, and Ru atoms tend to aggregate in the core region of the cluster. Furthermore, it became clear that the interatomic distance near the surface tends to shrink more than in the case of a solid, and the degree of shrinkage is related to the number of occupied d-orbitals. On the other hand, it was found that when the surface is oxidized, Ru atoms move from the nuclear region to the vicinity of the surface and have a chemical bond with oxygen, which greatly stabilizes the cluster. These calculations suggest that the stable structure may change depending on the oxidation state of the nanoclusters.
    The research results were published in RSC Advances. This was conducted in collaboration with Yamamuro Research Group of ISSP, The University of Tokyo. [2020/4/27]
    For more details, please see here.

  • We have constructed a highly accurate interatomic potential of body-centered cubic lattice (BCC) iron by a machine learning technique based on the neural network (NN) method. In order to quantitatively understand the mechanical properties of BCC iron at the atomic level, an interatomic potential that can accurately reproduce the dislocation dynamics needs to be developed, while the embedded atom method (EAM) potential, which has been widely used so far, may not have enough accuracy. The NN potential we have constructed in this study can not only reproduce the Peierls barrier of the dislocation core by the first-principles calculation, but also accurately calculate the energy profile of the screw dislocation core. The newly developed NN potential is expected to apply for large-scale molecular dynamics simulations to investigate the mechanical properties of BCC iron.
    The research results were published in Phys. Rev. Materials. This was conducted in collaboration with Mori Research Group of College of Industrial Technology. [2020/4/24]
    For more details, please see here.