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Quantum Material Properties Group

Quantum Materials Field

We study electronic properties of superconductors and topological materials experimentally as well as theoretically.

Group Leader:Taichi Terashima

Theoretical mechanisms for band structure engineering in strongly correlated insulators via spin and charge perturbations

Current Topics

The highlight of our research in FY2025 is the theoretical elucidation of how and why electronic modes can be induced in strongly correlated insulators by various spin and charge perturbations such as magnetic field and light irradiation, which in turn alter the band structures (Fig. 1) [ 1 ]. The validity and generality across different models and dimensions are demonstrated using numerical calculations. The findings of this study provide basic principles for band-structure engineering in strongly correlated insulators, beyond the conventional framework of rigid-band-based electronics.

Fig. 1 Band structures for ↓-spin and ↑-spin electrons in a magnetic field, and without a magnetic field [ 1 ].

References

  1. M. Kohno,Physical Review B112, 245110 (2025). DOI: 10.1103/ythd-s2x8

Group members

  • Taichi Terashima

    Taichi Terashima

    • Group Leader
  • Masanori Kohno

    Masanori Kohno

    • Chief Researcher
  • Minoru Tachiki

    Minoru Tachiki

    • Principal Researcher
  • Hiroyuki Yamase

    Hiroyuki Yamase

    • Principal Researcher
  • Shuuichi Ooi

    Shuuichi Ooi

    • Senior Researcher
  • Takako Konoike

    Takako Konoike

    • Senior Researcher

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