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2022 Fiscal Year Annual Research Report

Experimental study of topological phases in strongly correlated system

Research Project

Project/Area Number 20F20315
Research InstitutionThe University of Tokyo

Principal Investigator

中辻 知  東京大学, 大学院理学系研究科(理学部), 教授 (70362431)

Co-Investigator(Kenkyū-buntansha) FENG ZILI  東京大学, 理学(系)研究科(研究院), 外国人特別研究員
Project Period (FY) 2020-11-13 – 2023-03-31
KeywordsNodal Line / Anomalous Nernst Effect
Outline of Annual Research Achievements

We systematically studied the composition dependence of anomalous Nernst effect (ANE) in FexGa4-x system. Our research provides an ideal candidate for application using ANE. Firstly, We find a peak value of 5.4 μV/K in Fe3.09Ga0.91 which is the largest room-temperature value so far observed in polycrystalline magnetic compounds. Moreover, we found this large room-temperature ANE in the polycrystalline Fe3Ga is robust against Fe doping, making this material a promising candidate. Secondly, our work provides an experimental realization of the tuning of the anomalous Nernst effect by the Berry curvature engineering. Our theoretical analysis suggests that the Fe doping increases the exchange splitting effect, thereby tuning Berry curvature near the Fermi energy.

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

  • Research Products

    (1 results)

All 2022

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results)

  • [Journal Article] Giant and Robust Anomalous Nernst Effect in a Polycrystalline Topological Ferromagnet at Room Temperature2022

    • Author(s)
      Feng Zili、Minami Susumu、Akamatsu Shuhei、Sakai Akito、Chen Taishi、Nishio‐Hamane Daisuke、Nakatsuji Satoru
    • Journal Title

      Advanced Functional Materials

      Volume: 32 Pages: 2206519~2206519

    • DOI

      10.1002/adfm.202206519

    • Peer Reviewed / Int'l Joint Research

URL: 

Published: 2023-12-25  

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