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2023 Fiscal Year Final Research Report

Dynamics of skyrmions and their applications to neuromorphic devices

Research Project

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Project/Area Number 21H01794
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionInstitute of Physical and Chemical Research (2023)
The University of Tokyo (2021-2022)

Principal Investigator

Yokouchi Tomoyuki  国立研究開発法人理化学研究所, 創発物性科学研究センター, ユニットリーダー (20823389)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsスキルミオン / ニューロモルフィックデバイス / 非相反伝導現象
Outline of Final Research Achievements

In recent years, the importance of machine learning using artificial neural networks (ANN) has rapidly increased. However, conventional devices used to run ANNs face challenges such as high power consumption. Therefore, research on devices specialized for running ANNs (artificial intelligence devices) has been advancing. Skyrmions, in particular, have garnered attention as a promising candidate. This research focused on the creation and performance evaluation of artificial intelligence devices using skyrmions, aiming to enhance their performance. Specifically, we evaluated the performance of physical reservoir devices using skyrmions and achieved high recognition rates in handwritten digit recognition. Additionally, we observed nonlinear responses in antiferromagnetic materials and Weyl semimetals, exploring their potential applications in neuromorphic devices.

Free Research Field

物性物理

Academic Significance and Societal Importance of the Research Achievements

本研究の社会的意義は、エネルギー効率の高い高性能人工知能の実現につながる可能性がある点である。従来のCPUやGPUは消費電力が大きく、メモリ機能がないため効率が低下する。スキルミオンを用いた人工知能素子は低消費電力で操作可能であり、メモリ効果を持つため計算効率を大幅に向上させる可能性を秘めている。また、スキルミオンの粒子性によりナノスケールで多数のノード形成が容易で、高密度集積回路が実現可能という利点もある。また、本研究で観測した反強磁性体やワイル半金属における非線形応答は、人工知能素子の新たな動作原理として発展してく可能性を秘めている。

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Published: 2025-01-30  

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