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Quantum Condensed Matter Physics Lab
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The lab creates new materials and discovers properties that are not yet known.
AboutAbout the lab
Searching for new materials and new properties.
The Quantum Condensed Matter Physics Lab works both on creating new materials and on discovering properties that are not yet known.
In experiments, the lab develops quantum materials that show superconductivity or magnetism. It makes samples by high-pressure synthesis and vacuum deposition, examines them with diffraction experiments and electron microscopy, and measures how electricity flows through them and their magnetization.
In theory, the lab uses field theory to calculate how electrons flow in spintronic devices and topological insulators.
The lab is located in the Research Institute for Electronic Science, and students from the Department of Physics carry out their graduation research here.
Key terms
- Superconductivity
- A phenomenon in which electrical resistance becomes zero when a material is cooled below a certain temperature.
- Single crystal
- A crystal in which the arrangement of atoms is aligned in the same orientation throughout. It is used to measure properties accurately.
- Topological insulator
- A material that does not conduct electricity in its interior but conducts electricity only on its surface.
NewsLab news
Paper by Prof. Kobayashi and colleagues published in Journal of the Physical Society of Japan
Paper by Assistant Professor Oishi and colleagues published in Physical Review B
Undergraduate student wins Poster Award at the Japan-Taiwan-India Symposium
Assistant Professor Oishi receives the "Poster Award" (26th RIES-HOKUDAI Internation…)
Paper by Prof. Kobayashi and colleagues published in Nature Communications
ResearchResearch themes
The lab's research rests on two pillars: searching for new materials and searching for new physical properties. It pursues both experiments that create materials by high-pressure synthesis and single-crystal growth, and theory that solves electron behavior using field theory.
*Illustrative imageNew Materials by High-Pressure Synthesis
A high-pressure synthesis apparatus makes it possible to realize metastable structures that cannot be obtained by ordinary methods. The lab showed that InTe, normally an insulator, takes a different structure under high pressure and becomes a superconductor. It is also searching for other compositions under high pressure.
*Illustrative imageGrowing Single Crystals of Metastable Structures
For transition metal dichalcogenides with layered structures, and for misfit layered chalcogenides that have no unit cell, the lab is searching for new ways of stacking layers. Just changing how two layers are stacked creates a new structure.
*Illustrative imageMaterials Without Inversion Symmetry
Materials with chiral structures, such as elemental tellurium, are known to show characteristic electronic states. The lab aims to develop new materials of this kind that lack inversion symmetry.
*Illustrative imageTheory of Transport Phenomena and Electronic Structure
The lab uses field theory to study how electrons flow and their electronic structure. Treating spin-orbit interaction as a non-Abelian gauge field, it pursues theoretical research toward the characteristics of spintronic devices and applications of topological insulators.
MembersFaculty
The members of the Quantum Condensed Matter Physics Lab consist of faculty, graduate students, undergraduate students, administrative assistants, and technical assistants.As of 2026
- ProfessorKaya Kobayashi
- Associate ProfessorKenji Kondo
- Assistant ProfessorRyohei Oishi
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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: “Thin section scan crossed polarizers Siilinjärvi R edit” kallerna / CC BY-SA 4.0 (cropped)
- New Materials by High-Pressure Synthesis: “DiamondAnvilCell 003” National Institute of Standards and Technology / Public domain (cropped)
- Growing Single Crystals of Metastable Structures: “Molybdenite-Quartz-244398” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
- Materials Without Inversion Symmetry: “Quartz Citrine Crystals in Their Natural Form” Jennifer A Hogan / CC BY-SA 4.0 (cropped)
- Theory of Transport Phenomena and Electronic Structure: “12-inch silicon wafer” Peellden / CC BY-SA 3.0 (cropped)
- Related lab (Low-Dimensional Materials Physics Lab): “900 magnet new” Speeding Cars at English Wikipedia / CC BY-SA 3.0 (cropped)
- Related lab (Solid State Electronic Properties Lab): “YBCO-xtal-3D-SF” Ben Mills / Public domain (cropped)
- Related lab (Statistical Physics Lab): “Geometric Frustration and Spin Correlated Disorder on a Hexagonal Lattice” Dxz2019 / CC BY-SA 4.0 (cropped)
- Related lab (J-Material Strongly Correlated Electron Physics Lab): “Liquid helium dewars” Adville / CC BY-SA 4.0 (cropped)
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