HAYASHI Masahiko

写真a

Affiliation

Faculty of Education and Human Studies  Department of School Education  Combined Courses for English,Mathematics and Science Teachers  Course for Science and Mathematics Teachers

Homepage URL

http://www.gipc.akita-u.ac.jp/~hayashim/index-en.html

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Research Interests 【 display / non-display 】

  • Theoretical Condensed-Matter Physics

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Graduating School 【 display / non-display 】

  • 1985.04
    -
    1989.03

    The University of Tokyo   Faculty of Science   Department of Physics   Graduated

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Graduate School 【 display / non-display 】

  • 　
    -
    1994.03

    The University of Tokyo  Graduate School, Division of Science  Department of Physics  Doctor's Course  Completed

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Studying abroad experiences 【 display / non-display 】

  • 1996.05
    -
    1997.08

    Delft University of Technology   Post-doctoral researcher

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Campus Career 【 display / non-display 】

  • 2015.04
    -
    Now

    Akita University   Faculty of Education and Human Studies   Department of School Education   Combined Courses for English,Mathematics and Science Teachers   Course for Science and Mathematics Teachers   Professor  

  • 2007.04
    -
    2015.03

    Akita University   Abolished organization   Program in Environmental and Mathematical Science   Associate Professor  

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Academic Society Affiliations 【 display / non-display 】

  • 1996.04
    -
    Now
     

    United States

     

    American Physical Society

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Research Areas 【 display / non-display 】

  • Natural Science / Semiconductors, optical properties of condensed matter and atomic physics

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Thesis for a degree 【 display / non-display 】

  • Dynamical Superfluid Density in Vortex State of Type-II Superconductors

    Masahiko Hayashi, Hidetoshi Fukuyama 

    Journal of the Physical Society of Japan  63   3369 - 3391   1994.03

    Domestic Co-author

    The electromagnetic linear response both in the lattice state and liquid state of vortices in type-II superconductors are studied based on the dynamical superfluid density. The calculations are carried out paying special attention to the difference of the internal and the external vector potential. By use of the obtained dynamical superfluid density the static superfluid density, the electric conductivity and the magnetic permeability are studied. A significant difference in responses between the two states is found especially in the Lorentz force free configuration, namely when the supercurrent flows in the direction parallel to the applied magnetic field; the vortex lattice state is superconducting in this direction while the liquid state is not becaue of the vortex entanglement and cutting effects. The magnetic susceptibility, especially in lattice state, has been examined in detail.

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Research Achievements 【 display / non-display 】

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2023.04  -  2025.03  Investigator(s): Masahiko Hayashi

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2022.04  -  2025.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2015.04  -  2017.03 

  • Grant-in-Aid for Scientific Research on Priority Areas

    Project Year： 2008.04  -  2010.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2006.04  -  2009.03 

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Presentations 【 display / non-display 】

  • On the conductance formula using singular value decomposition

    Masahiko Hayashi

    International Symposium on Hybrid Quantum Systems 2019 (HQS2019)  (Kunibiki Messe, Matsue, Japan)  2019.12  -  2019.12 

  • Gaussian-Fluctuation Corrections to the Phase Diagram of t-J Model

    Masahiko Hayashi

    Research Frontier of Advanced Spectroscopies for Correlated Electron Systems  (Institute for Materials Research (IMR), Tohoku University, Sendai, Japan)  2019.06  -  2019.06  Institute for Materials Research (IMR), Tohoku University

  • Fluctuation Effects on the Phase Diagram of Cuprate High-T_c Superconductors Based on the t-J Model

    Masahiko Hayashi

    The 12th international conference on materials and mechanisms of superconductivity (M2S 2018)  (Beijing International Convention Center, Beijin, China)  2018.08  -  2018.08 

  • Effects of Fluctuations in the Phase Diagram of high-Tc Cuprate Superconductors

    Masahiko Hayashi, Kazuhiro Kuboki, Yasunari Tanuma

    第11回超伝導国際会議  (CICG, Geneva, Switzerland)  2015.08  -  2015.08 

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