Photon Factory

KEK

Solid State Physics Section

We, solid state physics section, conducs experimental and theoretical research to elucidate the origin of the physical properties and the functions of materials by investigating the crystal and electronic structures of materials using four quantum beams at IMSS, such as synchrotron radiation. Based on the knowledge obtained from these studies, we are also promoting the development of novel physical properties of materials and the development of new materials. In cooperation with Photon Factory synchrotron radiation experimental facilities, we are also developing new experimental techniques and optimizing experimental equipments taking next-generation light sources into consideration.

section leader Section Leader:Prof. Reiji KUMAI

Example of Research

Elucidation of the Origin of Physical Properties by Precise Structural Analysis

We are studying how the arrangement of atoms, ions, and molecules in crystals contributes to the emergence of physical properties, and the relationship between structural modulation and changes in physical properties that occur under external field, such as temperature, electric field, pressure, and light irradiation.

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External electric field and ion displacement in an "electronic ferroelectric" TTF-CA.

Elucidation of novel ordered phases behind the emergence of physical properties

In materials science, novel ordered states are often discovered behind new physical properties. Such new ordered states are not only interesting as fundamental physics, but also extremely important for understanding the mechanism of physical properties.

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Various novel ordered structures: orbital and spin-state ordering.
Members Specialized fields Links

Reiji KUMAI [Professor]

reiji.kumai@kek.jp
  • Elucidation of the mechanism of physical property expression by precise structure analysis and structure analysis under external field
researchmap
ORCID

Hajime SAGAYAMA [Associate Professor]

hajime.sagayama@kek.jp
  researchmap