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Okamoto Lab
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A lab that creates new crystalline materials with properties no one has ever seen.
AboutAbout the lab
Outstanding new materials from all elements.
The Okamoto Lab searches for new crystalline materials that show unusual quantum phenomena and novel electronic functions.
Focusing on inorganic compounds containing transition metals, the lab makes materials from all kinds of elements using a variety of synthesis methods.
Combining ideas for new materials with information from databases, the lab searches for materials with a focus on superconductivity, magnetism, and energy conversion.
The lab more often encounters unexpected properties than the ones it was aiming for, and considers this the fascinating part of exploring new materials.
Key terms
- Transition metal
- A group of metallic elements, such as iron, copper, and nickel, located in the middle of the periodic table. Their properties are determined by d electrons.
- Superconductivity
- A phenomenon in which electrical resistance drops to zero at low temperatures and magnetic fields are expelled.
- Geometric frustration
- A state in which, because of arrangements such as triangles, neighboring spins cannot align antiparallel to each other, so the stable arrangement cannot be determined.
- Thermoelectric conversion
- Using electrons moving through a material to generate electricity from a temperature difference, or to cool using electricity.
NewsLab news
In a joint study with Hiroshima University and others, the lab succeeded in synthesizing a kagome-lattice oxide that conducts electricity well
The lab established a computational method to predict the crystal structures of all ionic materials
A master's student was selected as an outstanding performer at the midterm presentations of the Department of Advanced Materials Science
The complex magnetic structure of the antiferromagnetic metal CeTe3 was elucidated in a joint study
A doctoral student received a Poster Award at the Solid State Chemistry Forum workshop
ResearchResearch themes
The lab aims to explore new solid materials that pose new puzzles for condensed matter physics and lead to its progress. Focusing on compounds of transition metals in which d electrons play a role, it searches for new materials such as superconductors, magnetic materials, and energy conversion materials.
*Illustrative imageNew frustrated magnets
The lab synthesizes new magnetic materials with atomic arrangements that give rise to geometric frustration, such as kagome, pyrochlore, and triangular lattices, and searches for unusual electronic states that do not appear in ordinary materials.
*Illustrative imageSearching for new d-electron superconductors
Superconductors whose properties are governed by transition metal d electrons remain a phenomenon with many unresolved aspects. By discovering new superconductors, the lab aims to contribute to understanding the overall picture of superconductivity in d-electron systems.
*Illustrative imageHigh-performance thermoelectric materials
To achieve high thermoelectric performance, a material must simultaneously conduct electricity well, have a large thermopower, and conduct heat poorly. Focusing on materials with unusual features such as strongly low-dimensional crystal structures, the lab searches for candidates for next-generation materials.
*Illustrative imageAntiferromagnets whose volume changes greatly in a magnetic field
The lab synthesizes antiferromagnets, mainly materials with geometric frustration, and investigates changes in their shape and volume when a magnetic field is applied. The aim is to draw out useful functions from antiferromagnets.
MembersFaculty
The members of the Okamoto Lab are faculty members, project researchers, doctoral and master's students, and secretarial staff.As of 2026
- ProfessorYoshihiko OkamotoPublications ↗
- Assistant ProfessorRyutaro OkumaPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Gold-crystals” Alchemist-hp (talk) www.pse-mendelejew.de / CC BY-SA 3.0 de (cropped)
- New frustrated magnets: “Kagome-lattice-bw” WilliamSix / CC BY-SA 2.5 (cropped)
- Searching for new d-electron superconductors: “Quantum locking” Maxim Bilovitskiy / CC BY-SA 4.0 (cropped)
- High-performance thermoelectric materials: “Peltier element detail” Michael Bemmerl / CC BY 3.0 de (cropped)
- Antiferromagnets whose volume changes greatly in a magnetic field: “Magnetic field around solenoid” Maciej J. Mrowinski / CC BY-SA 4.0 (cropped)
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