Department

Division of Advanced Molecular Science
(Department of Materials Molecular Science, Electronic Structure)

Biography

1988 B.S. Tohoku University
1991 Ph.D. Tohoku University
1991 JSPS Postdoctoral Fellow, Tohoku University
1993 Research Associate, Kobe University
1993 Research Associate, Institute for Molecular Science
1998 Associate Professor, Kobe University
2002 Associate Professor, Institute for Molecular Science
2013 Professor, Osaka University
2020 Professor (Cross Appointment), Institute for Molecular Science
 

Main research themes

Exploring novel physical properties by multi-dimensional spectroscopy

Condensed matter, Biological materials, Optical property, Synchrotron radiation, Electron-energy-loss spectroscopy

Annual Review : PDF

Selected Publications

1. T. Nakamura, H. Sugihara, Y. Chen, R. Yukawa, Y. Ohtsubo, K. Tanaka, M. Kitamura, H. Kumigashira, S. Kimura, "Two-dimensional heavy fermion in monoatomic-layer Kondo lattice YbCu₂," Nat. Commun. 14, 7850 (2023).
2. Y. Ohtsubo, T. Nakaya, T. Nakamura, P. Le Fèrve, F. Bertran, F. Iga, S. Kimura, "Breakdown of bulk-projected isotropy in surface electronic states of topological Kondo insulator SmB₆(001)," Nat. Commun. 13, 5600 (2022).
3. S. Kimura, T. Kawabata, H. Matsumoto, Y. Ohta, A. Yoshizumi, Y. Yoshida, T. Yamashita, H. Watanabe, Y. Ohtsubo, N. Yamamoto, X. Jin, "Bulk-Sensitive Spin-Resolved Resonant Electron Energy-Loss Spectroscopy (SR-rEELS): Observation of Element- and Spin-Selective Bulk Plasmons,” Rev. Sci. Instrum. 92, 093103 (2021).
4. Y. Ohtsubo, Y. Yamashita, K. Hagiwara, S. Ideta, K. Tanaka, R. Yukawa, K. Horiba, H. Kumigashira, K. Miyamoto, T. Okuda, W. Hirano, F. Iga, S. Kimura, “Non-trivial surface states of samarium hexaboride at the (111) surface,” Nat. Commun. 10, 2298 (2019).
5. 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, “Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB₁₂,” Nat. Commun. 7, 12690 (2016).