In the Materials Structure Science Program, we are investigating the static structure of materials by means of precise X-ray crystal structural analysis, resonant X-ray scattering, magnetic X-ray scattering, and X-ray imaging. In addition, we are studying the dynamic structure of materials via a pump-and-probe experiment that uses a synchrotron radiation pulse. Our research has expanded from fundamental high-pressure properties to Earth and planetary science by a combination of high-pressure X-ray measurements. In addition to our research, we are optimizing beamlines and experimental devices to promote our research and are developing research methods that use the next-generation light source.
We are studying how the arrangement of atoms, ions, and molecules in crystals contributes to property expression. In addition, we are studying the relationship between changes in the crystal structure and the physical properties of crystals when external perturbation, such as temperature, electric field, pressure, or photoirradiation, is added.
In materials science, novel ordered phases related to new physical properties are often found. Such phases are not only interesting as fundamental physics but are very important to understand the origin of physical property.
Using X-ray diffraction and composite measurements from a combination of absorption spectroscopy, transmission imaging, and Mössbauer scattering, we are studying extraordinary crystal structures and physical properties under extreme conditions created by using a very high-pressure apparatus, a cryogenic device, and a laser-heating device. The aim of these wide-ranging studies is:
We are developing various imaging systems to perform highly sensitive and highly accurate non destructive observations of the inner structures of electronic materials such as electronic devices. We hope to improve the performance of electronic devices by elucidating defects and strain fields in a sample by means of imaging. We are also developing an X-ray imaging method that can identify elements with high sensitivity.
We are researching photoinduced modifications in the structure and electronic state by a molecular movie in optical functional materials, artificial photosynthesis systems, photocatalysts, and photoreactive proteins, and we are studying the mechanisms of the generation of those optical functions. We hope to develop new light energy conversion materials and ultrafast switching devices.
|NAKAO, Hironori||Assoc. Professor||Condensed matter|
|KUMAI, Reiji||Professor||Condensed matter|
|FUNAMORI, Nobumasa||Professor||High pressure science|
|ADACHI, Shinichi||Professor||Structural biology|
|KISHIMOTO, Shunji||Professor (KEK)||X-ray detector|
|HIRANO, Keiichi||Assoc. Professor||X-ray imaging|
|NOZAWA, Shunsuke||Assoc. Professor||Ultrafast Structural dynamics|
|SAGAYAMA, Hajime||Assoc. Professor||Condensed matter|
|OKUYAMA, Daisuke||Assoc. Professor||Magnetism, Crystal/magnetic structure analysis|
|IWANO, Kaoru||Assoc. Professor||Theory on condensed matter|
|SUGIYAMA, Hiroshi||Assistant Prof.||X-ray imaging|
|WAKABAYASHI, Daisuke||Assistant Prof.||High pressure geoscience|
|SHIBAZAKI, Yuki||Assistant Prof.||High pressure science|
|ICHIYANAGI, Kouhei||Researcher (KEK)|
BL-8A, BL-8B, BL-7C
BL-3A, BL-4C, BL-6C, BL-18B
BL-18C, AR-NE1A, AR-NE5C, AR-NE7A
BL-3C, BL-7C, BL-14B, BL-20B, AR-NE7A
Condensed Matter Research Center https://www2.kek.jp/imss/cmrc/english/index_eng.html
Instrument R&D Team http://pfwww.kek.jp/KeisokuSystem/(Japanese only)