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Kagawa Lab
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The lab creates and manipulates quantum states of matter using methods that go beyond thermal equilibrium.
AboutAbout the lab
The science of controlling quantum properties of matter using non-thermal-equilibrium processes
The Kagawa Lab, with "nonequilibrium" as its keyword, explores and seeks to understand the various quantum states that matter exhibits, and studies how to control those states.
The state of matter is normally determined as the most stable one under conditions such as temperature and pressure.
On the other hand, many materials around us, such as glass and steel, are made by going beyond that rule.
The lab aims to create and control new states of quantum materials using "non-thermal-equilibrium processes," such as sudden heating and cooling when a pulse is applied.
Key terms
- Non-thermal-equilibrium process
- A process that changes a material without letting it settle into a stable state (thermal equilibrium), such as sudden heating or cooling
- Superconductivity
- A phenomenon in which a material's electrical resistance drops to zero at low temperatures
- Magnetic skyrmion
- A magnetic structure on the scale of nanometers in which the directions of tiny magnets in a material are arranged in a swirl
NewsLab news
A paper on reversibly controlling the orientation of a helical magnetic structure with electric current was published
A master's student received the Outstanding Master's Thesis Award of the Physics Program
The Kagawa team at RIKEN reported the nonlinear chiral thermoelectric Hall effect in Nature Physics
A paper on magnetoelectric coupling and the multicaloric effect in multiferroics was published
A master's student received the Outstanding Master's Thesis Award of the Physics Program
ResearchResearch themes
The lab aims to create, control, and utilize states of quantum materials using non-thermal-equilibrium processes, going beyond the thermal equilibrium states determined by conditions such as temperature, pressure, and magnetic field. Its goal is to open up the condensed matter science of non-thermal-equilibrium states.
*Illustrative imageCreating order and superconductivity with pulses
This research uses optical or electrical pulses to create magnetic, charge, and orbital order as well as superconductivity. The lab has shown that pulsed currents can write and erase superconducting states and magnetic skyrmions.
*Illustrative imageExploring "hidden" quantum phases
The lab searches for and opens up "hidden" quantum phases that do not appear in the thermal-equilibrium phase diagram drawn with temperature and pressure.
*Illustrative imageBringing out properties through domains
Through "quantum phase domain engineering," which manipulates domains (regions of quantum phases formed inside a material), the lab aims to bring out properties of the material as a whole.
MembersFaculty
The members of the Kagawa Lab are faculty, doctoral, master's, and undergraduate students, and secretaries.As of 2026
- ProfessorFumitaka KagawaPublications ↗
- Assistant ProfessorKeisuke Matsuura
VoicesStudent voices
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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: “Meissner effect p1390048” Mai-Linh Doan / CC BY-SA 3.0 (cropped)
- Creating order and superconductivity with pulses: “Neel skyrmion coneplot” Forschungszentrum Jülich / CC BY 4.0 (cropped)
- Exploring "hidden" quantum phases: “An iceberg slightly tilted, Liefdefjord, Svalbard” Andreas Weith / CC BY-SA 4.0 (cropped)
- Bringing out properties through domains: “Magnetic stripe domains” DMGualtieri / CC BY-SA 3.0 (cropped)
- Related lab (笹本研究室): “Quantum material’s subtle spin behavior proves theoretical prediction ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (花井研究室): “A starling murmuration - geograph.org.uk - 6389346” Walter Baxter / CC BY-SA 2.0 (cropped)
- Related lab (西口研究室): “A starling murmuration near Gretna - geograph.org.uk - 5980881” Walter Baxter / CC BY-SA 2.0 (cropped)
- Related lab (松尾研究室): “Dilution Refrigerator ( )” UCL Mathematical & Physical Sciences from London, UK / CC BY 2.0 (cropped)
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