Photophysics Laboratory (Kimura Group) 光物性研究室(木村グループ)

Our research interests
Physical properties of solids, such as magnetism and ferroelectricity, and life phenomena, such as redox and photosynthesis, originate from the electronic states in materials and their interactions. These research fields are known as condensed-matter physics and quantum biology. To clarify the electronic states provides us not only the information of the origins of the physical properties and life phenomena but also the expectation and creation of novel functionalities. To visualize of the change of the electronic state, we also develop novel spectroscopic techniques using synchrotron radiation and other quantum beams. On the basis of the obtained information of electronic structures, we are aiming to develop novel physical properties of new materials.



Reference:
Introduction of Research group @ Osaka Univ.
IMS Annual review: 2013, 2012, 2011, 2010, 2009, 2008, 2007

A novel photoemission spectrometer, namely Symmetry- And Momentum-Resolved electronic structure Analysis Instrument (SAMRAI) at UVSOR, a high-brilliance low-energy synchrotron radiation facility, developed by our group.


研究内容

本研究室では,固体や生体物質などの機能性の起源の解明と得られた量子情報からの新たな機能性発現を目指して研究を行っています。

固体の特徴的な物性である磁性や超伝導,また生命をつかさどる酸化還元反応や光合成など,物性の出現や生命現象に現れる化学反応の起源は,物質中の電子の状態や格子・分子の振動,またはそれらの間の量子力学的な相互作用によって現れます。つまり,電子や格子・分子振動,およびそれらの相互作用のすべてを観測すれば,物性や生命現象の起源を知るばかりでなく,新たな機能性の予測や創造も可能になります。

物質の電子や格子・分子の状態を観測するためには,真空紫外線や赤外・テラヘルツ線が有効です。電子線加速器から発生するシンクロトロン光を使った新たな分光法やイメージング手法を開発することで,これまで観測できなかった新しい情報が得られます。

私達はこのような観点にたち,シンクロトロン光をはじめとする量子ビーム源を機能性の起源を見る「目」として用いることで,これまで見えなかった電子状態の変化を可視化し,そこで得られた情報を元にして新しい機能性の創造を目指しています。

Press release
  1. "Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12",
    K. Hagiwara, Y. Ohtsubo, M. Matsunami, S. Ideta, K. Tanaka, H. Miyazaki, J. E. Rault, P. Le Fèvre, F. Bertran, A. Taleb-Ibrahimi, R. Yukawa, M. Kobayashi, K. Horiba, H. Kumigashira, K. Sumida, T. Okuda, F. Iga, S. Kimura,
    Nat. Commun. 7, 12690 (2016) [7 pages].
  2. "Surface Tomonaga-Luttinger-Liquid State on Bi/InSb(001)",
    Y. Ohtsubo, J. Kishi, K. Hagiwara, P. L. Fevre, F. Bertran, A. Taleb-Ibrahimi, M. Matsunami, K. Tanaka, S. Kimura,
    Phys. Rev. Lett. 115, 256404 (2015) [5pages].
  3. "Quadratic Fermi node in a 3D strongly correlated semimetal",
    T. Kondo, M. Nakayama, R. Chen, J. J. Ishikawa, E.-G. Moon, T. Yamamoto, Y. Ota, W. Malaeb, H. Kanai, Y. Nakashima, Y. Ishida, R. Yoshida, H. Yamamoto, M. Matsunami, S. Kimura, N. Inami, K. Ono, H. Kumigashira, S. Nakatsuji, L. Balents, S. Shin,
    Nat. Commun. 6, 10042 (2015) [8 pages]
    .
  4. "Role of Quantum and Surface-State Effects in the Bulk Fermi Level Position of Ultrathin Bi films",
    T. Hirahara, T. Shirai, A. Takayama, T. Hajiri, M. Matsunami, K. Tanaka, S. Kimura, S. Hasegawa, K. Kobayashi,
    Phys. Rev. Lett. 115, 106803 (2015) [5 pages].
  5. "Electron-phonon coupling investigation via phonon dispersion measurement in graphite by angle-resolved photoelectron spectroscopy",
    S. Tanaka, M. Matsunami, S. Kimura,
    Sci. Rep. 3, 3031 (2013) [6 pages].
  6. "One-Dimensional Uneven Peanut-Shaped C60 Polymer: A Quantum Electronic System in Riemannian Space",
    J. Onoe, T. Ito, S. Kimura, H. Shima, Y. Toda, H. Yoshioka,
    Fullerene, Nanotubes, and Carbon Nanostructures 20, 1-16 (2012).
  7. "Existence of Heavy Fermions in the Antiferromagnetic Phase of CeIn3",
    T. Iizuka, T. Mizuno, B. H. Min, Y. S. Kwon, S. Kimura,
    J. Phys. Soc. Jpn. 81, 043703 (2012) [4 pages].
  8. "Interfacing 2D and 3D Topological Insulators: Bi(111) Bilayer on Bi2Te3",
    T. Hirahara, G. Bihlmayer, Y. Sakamoto, M. Yamada, H. Miyazaki, S. Kimura, S. Blugel, S. Hasegawa,
    Phys. Rev. Lett.107, 166801 (2011) (5 pages).
  9. "Nodeless superconducting gap in AxFe2Se2 (A = K, Cs) revealed by angle-resolved photoemission spectroscopy",
    Y. Zhang, L. X. Yang, M. Xu, Z. R. Ye, F. Chen, C. He, H. C. Xu, J. Jiang, B. P. Xie, J. J. Ying, X. F. Wang, X. H. Chen, J. P. Hu, M. Matsunami, S. Kimura, D. L. Feng,
    Nat. Mater. 10, 273-277 (2011).
  10. "Electronic-Structure-Driven Magnetic Ordering in a Kondo Semiconductor CeOs2Al10",
    S. Kimura, T. Iizuka, H. Miyazaki, A. Irizawa, Y. Muro, T. Takabatake,
    Phys. Rev. Lett. 106, 056404 (2011) (4 pages).

  11. "Direct Observation of Momentum-Dependent Exchange Interaction in a Heisenberg Ferromagnet",
    H. Miyazaki, T. Ito, H.J. Im, S. Yagi, M. Kato, K. Soda, S. Kimura,

    Phys. Rev. Lett. 102, 227203 (2009) (4 pages).
  12. "Direct Observation of Dispersive Kondo Resonance Peaks in a Heavy-Fermion System",
    H. J. Im, T. Ito, H.-D. Kim, S. Kimura, K.E. Lee, J.B. Hong, Y.S. Kwon, A. Yasui, H. Yamagami,
    Phys. Rev. Lett. 100, 176402 (2008) (4 pages).
  13. "Tunable narrowband terahertz emission from mastered laser-electron beam interaction",
    S. Bielawski, C. Evain, T. Hara, M. Hosaka, M. Katoh, S. Kimura, A. Mochihashi, M. Shimada, C. Szwaj, T. Takahashi, Y. Takashima,
    Nat. Phys. 4, 390-393 (2008).


    Copyrights (C) 2013-2016. All Right Reserved