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Seki Lab
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The lab works to realize new electronic functions using new materials that host skyrmions and other such states.
AboutAbout the lab
From materials discovery to new electronics.
The Seki Lab studies new behaviors of electrons, starting from the creation of new materials.
Focusing on geometric properties of materials such as topology and symmetry, the lab searches for materials in which electrons feel enormous “emergent electromagnetic fields.”
The lab measures material properties using small devices made by microfabrication, aiming for functions that lead to information processing with extremely low power consumption and sensing with very high sensitivity.
Key terms
- Skyrmion
- A particle-like structure formed in a magnet when electron spins (tiny magnets) are arranged in a swirl
- Antiferromagnet
- A material in which neighboring spins align in opposite directions, so that it shows no magnet-like property (magnetization) as a whole
- Spintronics
- Technology that uses the spin of electrons, their property as tiny magnets, to record and process information
NewsLab news
A student received the Outstanding Bachelor's Thesis Award from the Department of Applied Physics
Associate Professor Yoshihiro Okamura joins the lab
Paper published on an altermagnet that can read and write information at room temperature
Project Assistant Professor Duy Khanh Nguyen received the Young Scientist Award of the Physical Society of Japan
Paper published clarifying the dynamics of polar magnets
ResearchResearch themes
Based on geometric properties such as topology, symmetry, and dimensionality, the lab explores new materials and aims to realize new functions in electronics and spintronics. In addition to materials design, the lab also fabricates and measures microdevices made by microfabrication.
*Illustrative imageAntiferromagnets that function at zero magnetization
Among antiferromagnets, in which spins align in opposite directions, the lab intensively searches for materials that break time-reversal symmetry. The goal is to put the enormous emergent magnetic field that arises even without magnetization to use in next-generation information materials.
*Illustrative imageSkyrmions carrying information at high density
Using interactions mediated by itinerant electrons moving through metals, the lab has found new materials in which skyrmions much smaller than before are realized in compounds with common crystal structures. The lab has also succeeded in discovering a wide variety of topological quasiparticles.
*Illustrative imageSeeing skyrmion “strings” in three dimensions
Using X-ray magnetic tomography, the lab directly observed the three-dimensional shape of string-like skyrmions inside a crystal. The lab has also shown that spin oscillations propagate over long distances along the strings.
*Illustrative imageDiode effect of magnetic waves and lattice vibrations
In magnets that break both time-reversal and spatial-inversion symmetry, the lab experimentally demonstrated a diode effect, in which propagation differs depending on direction, for magnetic waves (magnons) and lattice vibrations (phonons).
MembersFaculty
The members of the Seki Lab consist of faculty, assistants, doctoral, master's, and undergraduate students, and collaborating researchers.As of 2026
- ProfessorShinichiro SekiPublications ↗
- Associate ProfessorYoshihiro OkamuraPublications ↗
- Assistant ProfessorAki KitaoriPublications ↗
- Project Assistant ProfessorNguyen Duy KHANHPublications ↗
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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: “Neel skyrmion coneplot” Forschungszentrum Jülich / CC BY 4.0 (cropped)
- Antiferromagnets that function at zero magnetization: “Flux Antiferromagnet” Khalihar / CC BY 4.0 (cropped)
- Skyrmions carrying information at high density: “Block skyrmion” Nitish Mathur, Matthew J. Stolt, and Song Jina / CC BY 4.0 (cropped)
- Seeing skyrmion “strings” in three dimensions: “Aust.-Synchrotron-Soft-X-ray-Beamline-Experimental-Station” jjron / CC BY-SA 3.0 (cropped)
- Diode effect of magnetic waves and lattice vibrations: “Domains in metal strips” Temiryazev / CC BY-SA 4.0 (cropped)
- Related lab (Kawasaki Lab): “PLD Plume” H.Perowne / CC BY-SA 3.0 (cropped)
- Related lab (Hasegawa Lab): “Printed flexible electronics ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (Kanazawa Lab): “Neel skyrmion coneplot” Forschungszentrum Jülich / CC BY 4.0 (cropped)
- Related lab (Ideue Lab): “Graphen” AlexanderAlUS / CC BY-SA 3.0 (cropped)
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