Major research fields
Strongly Correlated Electron Systems using Synchrotron Radiation X-rays
It is well-known that synchrotron radiation X-rays are a powerful type of quantum beam applied in various research fields. We mainly use SPring-8, which is the largest third generation synchrotron facility in the world, for our research activities.
Materials show many interesting and useful properties and phenomena such as superconductivity, magnetism, semiconductivity, and dielectricity. These Phenomena are essential components in our Modern life. The main player within materials is the electron, more than 1023of which work collectively to generate these properties. It is necessary to understand their behavior within the framework of quantum mechanics in order to elucidate their properties and to discover new phenomena. The X-ray is a perfect probe for these purposes because X-rays interact directly with electrons. Also this interaction is weak enough to allow us to analyze the experimental data in a straight -forward manner. X-rays can be used not only in diffraction for studies on crystal structures with atomic resolution, but also for spectroscopy, to study electronic structures, especially since the availability of synchrotron radiation X-rays at third generation sources like SPring-8, which furnish higher brightness, and better directional characteristics compared to second generation sources. The dynamical properties of electrons and atoms as well as their static properties can be investigated under the real-world conditions in both the energy and time domain, and in both reciprocal and real space. The main themes for our research are to investigate the dynamics related to reactions and properties in materials and to achieve quantum control by applying state of the art observation techniques developed at SPring-8. Currently strongly correlated electron systems, catalysts, and electro chemical system are studied with diffraction and spectroscopic methods.
Major relevant publications
- K. Tanigaki, T. W. Ebbesen, S.Saito, J. Mizuki, J. S. Tsai, Y. Kubo and S. Kuroshima, “Superconductivity at 33K in CsXRbYC60.” Nature 352, 222-223 (1991)
- I. Hirosawa, K. Prassides, J. Mizuki, K. Tanigaki, M. Gevaert, A. Lappas and J. K. Cockcroft, “Orientational Disorder of C60 in Li2CsC60.” Science 264, 1294-1297 (1994)
- Y. Nishihata, J. Mizuki, T. Akao, H. Tanaka, M. Uenishi, M. Kimura, T. Okamoto, and N. Hamada. “Self-regeneration of a Pd-perovskite catalyst for automotive emission Control.” Nature, 418, 164-167 (2002)
- M. Takahasi and J. Mizuki “Element-specific surface X-ray diffraction study of GaAs(001)-c(4x4). ” Phys. Rev. Lett. 96, 055506(4) (2006)
- K. Ishii, T. Tohyama and J. Mizuki “Inelastic x-ray scattering studies of electronic excitations.” J. Phys. Soc. Jpn. (Special Topics) 82 021015(1-24) (2013)