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Edagawa Lab (Strength and Physical Properties of Materials)
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The lab works toward new materials by studying how the arrangement of atoms relates to material properties.
AboutAbout the lab
How atoms are arranged determines a material's properties.
The Edagawa Lab studies the relationship between the arrangement of atoms in solids (their microscopic structure) and the physical properties of materials.
Atomic arrangements in solids fall into three types: periodic "crystals," quasi-periodic "quasicrystals," and "amorphous" solids, which have no long-range order.
These differences shape the properties of materials.
The lab aims to apply the knowledge gained in this way to the development of new materials.
Key terms
- Quasicrystal
- A solid with a special atomic arrangement in which the atoms are ordered, yet the same pattern never repeats periodically
- Photonic band gap
- A property by which light of specific frequencies cannot travel through a structure in any direction. It is used to confine light in a small space
- Topological insulator
- A material that does not conduct electricity in its interior, but conducts it only on its surface, like a special metal
- Dislocation
- A line-shaped defect in a crystal where the arrangement of atoms is shifted
NewsLab news
Review article published in the journal of the Physical Society of Japan
Paper published in STAM Methods
ResearchResearch themes
The lab aims to clarify the relationship between the microscopic structure and the physical properties of solids, and to apply the findings to the development of new materials. It studies quasicrystals, aperiodic photonic materials that control light, and thermoelectric materials based on topological insulators.
*Illustrative imageUncovering the Mechanisms of Quasicrystals
The lab studies quasicrystals, which have an atomic arrangement different from both crystals and amorphous solids. Its research covers a special elastic degree of freedom called the "phason," special phase transitions, and the mechanism by which atoms assemble to form a quasicrystal.
*Illustrative imageControlling Light with Aperiodic Structures
The lab discovered that even a random network structure with no periodicity can produce a photonic band gap, a property that blocks light of specific frequencies. It aims to elucidate the mechanism behind this and to realize devices that control light.
*Illustrative imageThermoelectric Materials Using Dislocations
Theory predicts that dislocations in topological insulators that satisfy certain conditions show a special metallic state. The lab aims to use these dislocations to develop high-performance thermoelectric materials that directly convert between heat and electricity.
MembersFaculty
The Edagawa Lab consists of faculty members, technical specialists, research fellows and collaborative researchers, master's students, and research trainees.As of 2025
- ProfessorKeiichi EdagawaPublications ↗
- Associate ProfessorYuki TokumotoPublications ↗
- Assistant ProfessorYasushi KamimuraPublications ↗
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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: “Icosahedrite Diffraction Pattern” Paul Steinhardt / CC BY-SA 4.0 (cropped)
- Uncovering the Mechanisms of Quasicrystals: “Quasicrystal1” J.W. Evans, The Ames Laboratory, US Department of Energy / Public domain (cropped)
- Controlling Light with Aperiodic Structures: “Cross-section image of a photonic crystal membrane” Calen Leverant / CC BY 4.0 (cropped)
- Thermoelectric Materials Using Dislocations: “Peltierelement 16x16” Bye / Public domain (cropped)
- Related lab (Nambu Lab): “EBSD orientation map of ferrous lath martensite” Tiberio / CC BY-SA 4.0 (cropped)
- Related lab (Yamabe-Mitarai Lab): “Turbine blades ( )” Håkan Dahlström from Malmö, Sweden / CC BY 2.0 (cropped)
- Related lab (Yoshida-Masuda Lab): “Silicon nitride Si3N4 bearing balls 1–20 mm” Lucasbosch / CC BY-SA 3.0 (cropped)
- Related lab (Tokumoto Lab): “Ho-Mg-ZnQuasicrystal” AMES lab., US Department of Energy / Public domain (cropped)
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