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Shibauchi-Ishida Lab
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The lab experimentally explores quantum phases in materials where electrons strongly influence one another.
AboutAbout the lab
Exploring the quantum phases formed by electrons in materials
The Shibauchi-Ishida Lab studies the many unusual states that electrons show inside materials.
In materials where electrons strongly influence one another, the quantum nature of the electrons comes to the fore and new states called "quantum phases" emerge.
Through experiments, the lab investigates superconductors (materials in which electrical resistance vanishes) that conventional theory cannot explain, as well as new types of phase transitions.
The "qpm" in the lab's website address stands for Quantum Phases of Matter.
Key terms
- BCS theory
- The standard theory explaining that superconductivity occurs when electrons form pairs mediated by lattice vibrations
- Quantum fluctuation
- The phenomenon in which a system's state fluctuates because of the uncertainty principle of quantum mechanics, even at absolute zero where there are no thermal fluctuations
- Electronic nematic phase
- A state in which a collection of electrons shows properties aligned along a particular direction, like molecules in a liquid crystal
NewsLab news
Lecturer Ishida joined the lab, and the lab started under a new structure
A doctoral student received the Dean's Award (Doctoral) from the Graduate School of Frontier Sciences
A master's student received the Dean's Award (Master's) from the Graduate School of Frontier Sciences
A master's student received the Department of Applied Physics Outstanding Master's Thesis Award
A master's student received the Department of Advanced Materials Science Outstanding Master's Thesis Award
ResearchResearch themes
The lab studies the many nontrivial states shown by large numbers of electrons in materials. Focusing on "quantum phases" that appear in materials with strong electron-electron interactions, it explores both the universality and the diversity of condensed matter physics.
*Illustrative imageSuperconductivity beyond conventional theory
The lab investigates mechanisms of superconductivity that the standard BCS theory cannot explain. Targets include iron-based high-temperature superconductors and unconventional (anisotropic) superconductors, in which the electron pairs are not isotropic in shape.
*Illustrative imageQuantum critical phenomena
The lab studies phenomena that appear when the phase transition temperature is lowered to absolute zero by changing pressure or chemical composition. Near that point, quantum fluctuations become large, and superconductivity can sometimes emerge.
*Illustrative imageElectronic nematic phase
This is a state in which a collection of electrons spontaneously breaks rotational symmetry and shows properties that differ depending on direction. The lab investigates its origin and its relationship to high-temperature superconductivity.
*Illustrative imageNew electronic states predicted by theory
The lab uses a variety of experimental methods to test states that have been discussed in theory but are not well understood experimentally. Examples include quantum spin liquids and topological superconductivity.
MembersFaculty
The members of the Shibauchi-Ishida Lab consist of faculty, project researchers, project specialist staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTakasada ShibauchiPublications ↗
- LecturerKousuke IshidaPublications ↗
- Assistant ProfessorKota IshiharaPublications ↗
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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: “Quantum locking” Maxim Bilovitskiy / CC BY-SA 4.0 (cropped)
- Superconductivity beyond conventional theory: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Quantum critical phenomena: “DiamondAnvilCell 003” National Institute of Standards and Technology / Public domain (cropped)
- Electronic nematic phase: “Nematic liquid crystal” Ingo Dierking / CC BY-SA 4.0 (cropped)
- New electronic states predicted by theory: “Herbertsmithite-163165” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
- Related lab (Arima-Tokunaga Lab): “SPring- img pano” en:User:Artorius / CC BY-SA 3.0 (cropped)
- Related lab (Tokura Lab): “Perovskite” Cadmium at English Wikipedia / Public domain (cropped)
- Related lab (Kimura Lab): “Ilmenite-155036” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
- Related lab (Motome Lab): “Neel skyrmion coneplot” Forschungszentrum Jülich / CC BY 4.0 (cropped)
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