Hisashi KOTEGAWA

Hisashi KOTEGAWA

Hisashi KOTEGAWA

D.Sc, Osaka University, 2002
Associate Professor

Research group: Condensed Matter Experiments Group
Phone: +81-78-803-5644
E-mail: kotegawacrystal.kobe-u.ac.jp

研究内容

Research on anomalous quantum phenomena that occur at low temperatures, such as superconductivity, multipole order, and magnetism in strongly correlated electron systems, as well as quantum functional properties mediated by these phenomena. My primary focus is on discovering new phenomena through single-crystal sample preparation and pressure effects, in pursuit of the profound and intricate world of materials science.

Main Publications

  1. H. Kotegawa, H. Tanaka, Y. Takeuchi, H. Tou, H. Sugawara, J. Hayashi, and K. Takeda
    “Large Anomalous Hall Conductivity Derived from an f-Electron Collinear Antiferromagnetic Structure”
    Phys. Rev. Lett. 133, 106301 (2024).
  2. H. Kotegawa, Y. Kuwata, V. T. N. Huyen, Y. Arai, H. Tou, M. Matsuda, K. Takeda, H. Sugawara, and M.-T. Suzuki
    “Large anomalous Hall effect and unusual domain switching in an orthorhombic antiferromagnetic material NbMnP”
    npj Quantum Materials 8, 56 (2023).
  3. H. Kotegawa, M. Matsuda, F. Ye, Y. Tani, K. Uda, Y. Kuwata, H. Tou, E. Matsuoka, H. Sugawara, T. Sakurai, H. Ohta, H. Harima, K. Takeda, J. Hayashi, S. Araki, and T. C Kobayashi
    “Helimagnetic Structure and Heavy-Fermion-Like Behavior in the Vicinity of the Quantum Critical Point in Mn3P”
    Phys. Rev. Lett. 124, 087202 (2020).
  4. H. Kotegawa, S. Nakahara, H. Tou, and H. Sugawara
    “Superconductivity of 2.2 K under Pressure in Helimagnet CrAs”
    J. Phys. Soc. Jpn. 83, 093702 (2014). Papers of Editors' Choice
  5. H. Kotegawa, V. Taufour, D. Aoki, G. Knebel, and J. Flouquet,
    “Evolution toward Quantum Critical End Point in UGe2”
    J. Phys. Soc. Jpn. 80, 083703 (2011). Papers of Editors' Choice
  6. H. Kotegawa, H. Sugawara, and H. Tou
    “Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure”
    J. Phys. Soc. Jpn. 78, 013709 (2009). Papers of Editors' Choice
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