Matsuda, Iwao
Associate Professor
SOLID STATE PHYSICS
University of Tokyo
Japan
Biography
We develop experimental techniques using vacuum ultraviolet ~ soft X-ray, generated by high brilliance synchrotron radiation, X-ray free electron laser (XFEL), and high-harmonic generation (HHG) laser, to reveal physical properties of single atomic layers and surface/interface systems. At SPring-8 BL07LSU, we operate the segmented cross undulator and develop the novel magneto-optical experimental technique using its function of the fast polarization switching. With XFEL and a HHG laser, ultrafast spin dynamics of magnetic ultrathin films and interface layers are investigated by time-resolved measurements of the resonant magneto-optical Kerr effect. At the time-resolved spectroscopy station in SPring-8 BL07LSU, time-resolved measurements of photoemission and X-ray absorption spectroscopy were made with laser and synchrotron radiation. Through the joint-researches of catalysis and photovoltaics, dynamics of carriers and molecules at the surface/interface are studied. With the temporal information collected by individual light sources at each time scale, ranging from femtoseconds to milliseconds, we promote understanding of the whole dynamic picture by combining the sequential information.
Research Interest
Developments of time-resolved soft X-ray spectroscopy and researches on surface dynamics Electronic structures of metal and semiconductor surfaces studied by means of photoelectron spectroscopy Development of time-resolved experiments using ultra-short soft X-ray pulses and researches on ultrafast spin dynamics
Publications
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*Suppression of supercollision carrier cooling in high mobility graphene on SiC(000-1): T. Someya, H. Fukidome, H. Watanabe, T. Yamamoto, M. Okada, H. Suzuki, Y. Ogawa, T. Iimori, N. Ishii, T. Kanai, K. Tashima, B. Feng, S. Yamamoto, J. Itatani, F. Komori, K. Okazaki, S. Shin and I. Matsuda, Phys. Rev. B 95 (2017) 165303(1-7).
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*L-edge resonant magneto-optical Kerr effect of a buried Fe nanofilm: Y. Kubota, M. Taguchi, H. Akai, Sh. Yamamoto, T. Someya, Y. Hirata, K. Takubo, M. Araki, M. Fujisawa, K. Yamamoto, Y. Yokoyama, S. Yamamoto, M. Tsunoda, H. Wadati, S. Shin and I. Matsuda, Phys. Rev. B 96 (2017) 134432(1-6).
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*Surface state of the dual topological insulator Bi Sb (112): I. Matsuda, K. Yaji, A. A. Taskin, M. D'angelo, R. Yukawa, Y. Ohtsubo, P. Le Fèvre, F. Bertran, S. Yoshizawa, A. Taleb-Ibrahimi, A. Kakizaki, Y. Ando and F. Komori, Physica B 516 (2017) 100-104.
