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Yamaura Lab
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The lab reads the properties and functions of materials from their crystal structures.
AboutAbout the lab
Research that is fun: make it, then measure it
The Yamaura Lab studies structural condensed matter physics, clarifying the properties of materials on the basis of their crystal structures.
The lab works on a wide range of materials, from new superconductors and magnetic materials to applied materials such as dielectrics, semiconductors, and solar cells.
Samples are synthesized in the lab or received from collaborating groups, and their structures are examined with the lab's X-ray diffractometer and at large-scale facilities using synchrotron radiation and neutrons.
With the motto "research that is fun: make it, then measure it," the lab also explores ways to draw out higher performance from materials.
Key terms
- Structural condensed matter physics
- A field that investigates the properties of materials and the mechanisms behind them on the basis of how atoms are arranged (the crystal structure)
- Quantum beams
- Beams of light or particles used to probe the inside of materials, such as synchrotron radiation (very bright X-rays) and neutrons
- Rattling
- Large vibrational motion of an atom inside a cage that is too large for it, so that it moves around freely within the cage
NewsLab news
Paper on ion exchange in a β-pyrochlore oxide published in Dalton Trans.
A master's student received the Solid State Chemistry Forum Award
Paper on an all-organic dielectric published in J. Phys. Chem. C
ResearchResearch themes
The lab studies the structural condensed matter physics of functional materials, that is, it clarifies the properties of materials on the basis of their crystal structures. Using quantum beams such as synchrotron radiation and neutrons, it examines materials over a wide range of scales, starting from the atomic scale, with the aim of understanding how their functions arise.
*Illustrative imageCrystal structure of an all-organic dielectric
For a dielectric made only of organic compounds and containing no metals, the lab solved its low-temperature crystal structure, which had long remained unsolved, and showed that it is an antiferroelectric structure. This work was carried out jointly with a lab at the University of Yamanashi, and dielectric measurements also revealed dielectric relaxation that appears to be caused by the rotation of round molecules.
*Illustrative imageSwapping the contents of a cage with a crown-shaped molecule
Using 18-crown-6, a crown-shaped molecule, the lab removed the K ions inside the cages of the β-pyrochlore oxide KOs2O6 without destroying the cages. The structure was examined by synchrotron and neutron diffraction, and specific heat measurements showed that rattling and superconductivity disappear.
*Illustrative imageAn iron-based superconductor with two domes
The iron-based superconductor LaFeAsO1-xHx, in which hydrogen substitution is used, has two regions where it becomes superconducting. The lab measured the magnetic field at which superconductivity is destroyed at the high magnetic field facility of the Institute for Solid State Physics, and found that the two superconducting phases behave very differently.
*Illustrative imagePolar nanostructures seen through multiscale analysis
The lab examined the perovskite-type oxynitride LaTiO2N at different distance scales, using pair distribution function analysis of X-ray diffraction, EXAFS, and neutron data. It found that even though the average structure is non-polar, the structure is polar in nanoscale regions.
MembersFaculty
The members of the Yamaura Lab are faculty, doctoral and master's students, research students, and secretaries.As of 2026
- Associate ProfessorJunichi YamauraPublications ↗
- Assistant ProfessorTaiki ShiotaniPublications ↗
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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: “A Hilger and Watts Y290 four-circle X-ray diffractometer” Prof. David J. Watkin / CC BY-SA 4.0 (cropped)
- Crystal structure of an all-organic dielectric: “Perovskite structure” Scythian / Public domain (cropped)
- Swapping the contents of a cage with a crown-shaped molecule: “18-crown-6-3D-balls” Ben Mills and Jynto / Public domain (cropped)
- An iron-based superconductor with two domes: “Levitation meissner” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Polar nanostructures seen through multiscale analysis: “VULCAN diffractometer ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
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