Trans-Scale Quantum Science Institute

News

2025

  • Press Release

    【Press Releases】Blink and you will miss it: magnetism switching in antiferromagnets
    ―Scientists successfully visualize two distinct mechanisms of magnetism switching in antiferromagnets―

    A research team led by Ryo Shimano of the University of Tokyo has successfully visualized two distinct mechanisms through which up and down spins, inherent properties of electrons, switch in an antiferromagnet, a material in which spin alignments cancel each other out. One of the visualized mechanisms provides a working principle for developing ultrafast, non-volatile magnetic memory and logic devices, which could be much faster than today’s technologies. The findings are published in the journal Nature Materials.

    For more information, please check out the official press release：
    https://www.s.u-tokyo.ac.jp/en/press/10998/
    Full publication：https://www.nature.com/articles/s41563-025-02402-8

  • Awards & Accomplishments

    Prof. Satoru Nakatsuji and Ryotaro Arita was selected as a Highly Cited Researcher 2025 by Clarivate.

    Prof. Satoru Nakatsuji and Ryotaro Arita, members of the Trans-Scale Organization, have been selected as Clarivate Highly Cited Researchers 2025.

    For more details, please see the following.

  • Awards & Accomplishments

    [Award] Prof. Masaki Oshikawa, at ISSP, has received the 71st (2025) Nishina Memorial Prize is awarded for his outstanding achievements in "Theoretical and mathematical studies of quantum spin systems"
    The Nishina Memorial Prize was awarded to physicists for their outstanding achievements in the field of basic and applied physics. (Nishina Memorial Prize).

    Award Page: 71st (2025) Nishina Memorial Prize

  • Announcement

    SAA2025 Symposium: Spintronics with Antiferromagnets and Altermagnets

    The Trans-Scale Quantum Science (TSQS) institute co-organized, with the Institute for Solid State Physics (ISSP) and Johns Hopkins University, the International Symposium on Spintronics with Antiferromagnets and Altermagnets (SAA 2025). This event explores the frontiers of functional antiferromagnets, spintronics, and topological quantum materials.

    For more details about this event, please see https://tsqi.phys.s.u-tokyo.ac.jp/tsqi/en/events/1114/

  • Press Release

    Room-Temperature Field Switching of Exchange Bias Effect

    A research collaboration led by PhD student Mihiro Asakura, Project Associate Professor Tomoya Higo, and Professor Satoru Nakatsuji has discovered an exchange bias effect at the interface between the Weyl antiferromagnet Mn3Sn and ferromagnets, which can be effectively controlled by applying a magnetic field without changing temperature. This study reveals that the controllability of exchange bias effect between ferromagnets and antiferromagnets can be improved by utilizing antiferromagnets with macroscopically broken time-reversal symmetry. These findings unveil a new functionality of the Weyl antiferromagnet Mn3Sn and lay the foundation for next-generation antiferromagnetic spintronics. For more information, please check out the official press release (https://www.s.u-tokyo.ac.jp/en/press/10829/) and the full publication (https://pubs.acs.org/doi/10.1021/acs.nanolett.5c00988).

  • Announcement

    Maryland and Japan: Collaborations Toward the Quantum Industry of the Future

    On April 14, 2025, World Quantum Day, Maryland Governor Wes Moore made his first official international mission to Japan and led a high-level quantum technology roundtable in Tokyo. The roundtable brought together prominent government, industry, and science leaders from Japan and the US to deepen international partnerships in the fast-growing quantum sector.

    Trans-Scale Quantum Science Institute supported coordinating this event, and Prof. Satoru Nakatsuji moderated the roundtable. This involvement highlights our commitment to promoting international collaboration and global quantum research initiatives.

    For more details of this event, please see the official press release from the Governor’s Office:

    https://governor.maryland.gov/news/press/pages/governor-moore-celebrates-world-quantum-day-in-tokyo-with-roundtable-discussion-among-global-industry-leaders.aspx

     

  • Announcement

    Presented a talk on “非共線反強磁性体におけるスピン分裂バンドとトンネル磁気抵抗” at The 253th Topical Symposium of the Magnetics Society of Japan.

    Presentation PDF

2024

  • Announcement

    [Award] Dr. Tomoya Higo, Specially Appointed Associate Professor at Nakatsuji Laboratory, has received the 3rd (2025) AAPPS-JPS Award for his outstanding achievements in "Exploration of Emerging Functional Properties at the Surface and Interface of Magnetic Topological Semimetals." The AAPPS-JPS Award was established through a collaboration between the Association of Asia Pacific Physical Societies (AAPPS) and the Physical Society of Japan (JPS) to honor young researchers for their outstanding research contributions to physics and promote the field within the Asian region. (according to the JPS website).

    Award Page: 3rd (2025) AAPPS-JPS Award

  • Press Release

    Novel Spin-Torque Diode Effect Opening New Possibilities for Ultrafast Information Technology

    A research collaboration led by Assistant Professor Shoya Sakamoto and Associate Professor Shinji Miwa from the Institute for Solid State Physics, along with Professor Satoru Nakatsuji and Project Associate Professor Tomoya Higo from the Graduate School of Science at the University of Tokyo, has made remarkable strides in unlocking the potential of topological antiferromagnetic materials for future telecommunication applications. Their paper, titled "Antiferromagnetic spin-torque diode effect in a kagome Weyl semimetal," has been published in Nature Nanotechnology.
    This study unveils a new spin torque diode effect that remains stable at high frequencies, paving the way for developing ultrafast microwave devices. This advancement is essential for technologies that extend beyond 5G.
    For more information, please check out the official press release (https://www.su-tokyo.ac.jp/en/press/10596/) and the full publication (https://www.nature.com/articles/s41565-024-01820-0)

  • Announcement

    The Trans-Scale Quantum Science (TSQS) Institute co-organized, with OIST and the Gordon and Betty Moore Foundation, the inspiring international symposium focused on the connection between quantum materials and quantum information research.

    For more details, see https://tsqi.phys.s.u-tokyo.ac.jp/tsqi/en/events/1073/

  • Announcement

    An article about the collaborative research results (Isshiki et al., Phys. Rev. Lett. 132, 216702 (2024)) with Associate Professor Hironari Isshiki and Professor Yoshichika Otani from the Institute for Solid State Physics at the University of Tokyo (also Team Leader at RIKEN Center for Emergent Matter Science) was published in the Nikkan Kogyo Shimbun on July 25.

    Article Details：「反強磁性ワイル半金属」磁気分極を可視化　東大、新たな簡易手法

  • Announcement

    Lecture by Prof. Collin Broholm

    Date and Time: March 18, 2024 (Monday) 10:00～ (JST)　
    Venue: Room 1220, 2rd floor, Science Bldg. 4, Hongo Campus(in-person only)

    For more details, see https://tsqi.phys.s.u-tokyo.ac.jp/tsqi/en/events/1028/

2023

  • Announcement

    Our latest research on topological antiferromagnets and their spintronics applications are featured by JST.

    JST Website

  • Announcement

    The 135th Colloquium: Lecture by Prof. Chia-Ling Chien

    Date and Time: Friday, May 19th, 2023, 17:00-18:30 (JST)　
    Venue: Koshiba Hall, the 2nd floor, Faculty of Science Bldg. 1, Hongo Campus

    For more details, see https://www.phys.s.u-tokyo.ac.jp/colloquium/37408/

  • Announcement

    Call for Participation: Antiferromagnetic Spintronics Meeting on March 8

    Date and Time: Wednesday, March 8th, 2023, 9:00-11:50 (JST)　
    Venue: 3th Floor, Conference Room, the Ito International Research Center

    For more details, see https://tsqi.phys.s.u-tokyo.ac.jp/tsqi/en/events/889/

2022

  • Press Release

    【Press Release】An exotic quantum state of matter

    Original paper: Nature Physics (2022)

    Press release

  • Announcement

    Call for Participation: 2nd International Symposium on Trans-Scale Quantum Science on November 8 to 11

                                           * registration deadline: Abstract submission…September 16
                                                                                   Participation only    ….October 31     (both are JST)

2021

2020