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Low-Temperature Materials Science Lab
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The lab investigates and controls superconductivity and the electronic properties that emerge at low temperatures.
AboutAbout the lab
Exploring and controlling new low-temperature physical properties
The Low-Temperature Materials Science Lab studies the electronic properties of superconductors, whose characteristics appear prominently at low temperatures, and of strongly correlated electron systems.
The ultimate goal is not only to elucidate the physical phenomena that these materials show at low temperatures, but also to create samples and electronic states that cannot ordinarily exist, and to discover new physical phenomena while controlling them.
Recently, the lab has been pursuing research under the keywords electric-field-induced superconductivity, thin-film superconductivity, and novel superconductivity in magnetic fields.
The lab belongs to the Institute for Materials Research, and also belongs to the Metal Physics Division of the Department of Physics in the Faculty of Science and the Department of Physics in the Graduate School of Science.
Key terms
- Superconductivity
- A phenomenon in which a material's electrical resistance becomes zero when it is cooled below a certain temperature
- Strongly correlated electron systems
- Electronic states of materials in which electrons strongly influence one another, so that each electron cannot be treated independently
- Electric double layer transistor
- A device that uses an electrolyte to apply a strong electric field to the surface of a material. The electric field effect can change the properties of the material
- Vortex state
- A state in a superconductor in a magnetic field in which magnetic flux penetrates as thin vortex-shaped lines
NewsLab news
A student won the Best Poster Award at the IMR Lecture Meeting
A student won the Student Presentation Award of the Physical Society of Japan
ResearchResearch themes
The lab studies the physical properties of superconductors, whose characteristics appear prominently at low temperatures, and of strongly correlated electron systems. Using thin films, multilayer films, single crystals, and devices made from them, the lab measures their properties at low temperatures and in magnetic fields. The ultimate goal is to find new physical phenomena.
*Illustrative imageCreating superconductivity with electric fields
Using an electric double layer transistor structure, this research turns materials that are originally insulators or normal metals into superconductors by the electric field effect alone. The lab also aims to change spin states by using the spin-orbit interaction generated by strong electric fields.
*Illustrative imageControlling the properties of superconducting thin films and searching for new superconductors
By precisely controlling the electrochemical reactions (oxidation-reduction and etching) in an electric double layer transistor, the lab artificially alters superconducting properties to search for new superconducting states. In addition to searching for cuprates that become superconducting with both hole doping and electron doping, the lab can change the thickness of FeSe, an iron-based superconductor, thin films step by step, and can investigate the limit of thickness at which superconductivity appears.
*Illustrative imageSuperconducting tunnel junctions and spin injection
In a tunnel junction that connects a superconductor and a normal metal, the electronic states of the superconductor can be observed. When the normal metal is replaced with a ferromagnet and a current is passed through it, a nonequilibrium superconducting state with an imbalanced electron spin density arises inside the superconductor. The lab investigates its properties.
*Illustrative imageThe vortex state of high-temperature superconductors
In high-temperature superconductors such as cuprates, magnesium diboride, and iron-arsenide compounds, large thermal fluctuations and the effects of multiple superconducting gaps give rise to vortex states that were not prominent in conventional superconductors. The lab investigates their properties through measurements of magnetic torque, magnetization, and magnetoresistance.
MembersFaculty
The members of the Low-Temperature Materials Science Lab consist of faculty, master's students, technical staff, technical assistants, and secretaries.As of 2026
- Professor (Concurrent)Tsutomu Nojima
- Assistant ProfessorShintaro Nakamura
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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: “Superconducting Magnetic Separator Cryostat” Antonín Ryska / CC0 (cropped)
- Creating superconductivity with electric fields: “Superconductor” Edosz2010 / CC BY 4.0 (cropped)
- Controlling the properties of superconducting thin films and searching for new superconductors: “Film VO2” Nerfles / CC BY-SA 4.0 (cropped)
- Superconducting tunnel junctions and spin injection: “Superconducting Quantum-Limited Amplifier Chip in Navaho” OJB Quantum / CC BY 4.0 (cropped)
- The vortex state of high-temperature superconductors: “Levitating HTS BSCCO piece (Meissner effect) - 2” Winiar / CC BY-SA 3.0 (cropped)
- Related lab (IMR Theoretical Physics Lab): “Na8Si46 inorganic clathrate structure with coordination polyhedra” PickledSquid / CC BY-SA 4.0 (cropped)
- Related lab (Topological Materials Creation Lab): “Apparatus for CZ crystal growth” Віґор Тядійчук / CC BY-SA 1.0 (cropped)
- Related lab (Experimental Particle Physics (Accelerator) Lab): “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
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