Okayama University researchers discover new electronic state in metal

Researchers from Okayama University, in collaboration with Kitasato University, Chiba University, and the Institute of Photonic Science, have discovered a new electronic state in the layered inorganic compound Li0.5VS2. Using large-scale facilities such as SPring-8 and J-PARC, the team observed that vanadium atoms bond like molecules, a phenomenon that changes in two stages as temperatures decrease.

While the substance remains metallic in all states, its magnetic response varies significantly across these stages. This discovery, published in the journal ‘Chemistry of Materials’, demonstrates how chemical bonding, metallicity, and magnetism interact. The findings are expected to aid in the search for new quantum materials by allowing for the control of interatomic bonds through composition or pressure.

In other academic developments, Mizuki Ishii, a graduate student at Okayama University, received the Best Poster Award at a satellite conference of the International Congress on Photosynthesis Research in London. His research utilized X-ray Free-Electron Laser (XFEL) crystallography to analyze the structural determination of the high-spin S2 state in photosystem II.

Additionally, Okayama University participated in the ‘Okayama SDGs Fair 2026’, where President Yasutomo Nasu introduced the ‘Okayama version Beyond SDGs proposal’ aimed at the post-2031 era. The university also launched a university-wide course titled ‘Thinking Together About Okayama's Regional Issues’ to facilitate dialogue between students and local government, industry, and academic leaders regarding regional challenges like population decline.