• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Search for high-efficiency thermoelectric magnetic material and establish design guide principles

Research Project

Project/Area Number 20K22479
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0402:Nano/micro science, applied condensed matter physics, applied physics and engineering, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Minami Susumu  東京大学, 大学院理学系研究科(理学部), 特任助教 (10876840)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords熱電変換材料 / 異常ネルンスト効果 / 異常ホール効果 / 第一原理計算 / 熱電効果 / 磁性材料 / トポロジカル磁性体 / 熱電変換
Outline of Research at the Start

磁性体において発現する熱電効果に異常ネルンスト効果がある。 異常ネルンスト効果は従来のゼーベック効果と比較し効率的な熱電発電モジュールが実現可能であることが報告されている。 その起源は熱誘起による異常ホール効果であり電子波動関数のトポロジー(ベリー曲率)により特徴付けられる。 本研究では異常ネルンスト効果を活用した熱電発電デバイスの実現に向け、広い温度領域で動作可能且つ高効率な磁性熱電材料の探索を密度汎関数理論に基づく第一原理計算により行う。 また、電子状態のトポロジーの観点から巨大な異常ネルンスト効果を発現するための普遍的な特徴量を明らかにすることで、物質設計の指針を導く。

Outline of Final Research Achievements

In this research project, we aimed to search for magnetic materials with a large anomalous Nernst effect and elucidate its manifestation mechanism. Previous studies have focused on the Weyl points that arise when considering spin-orbit interaction. We focused on the energy dispersion of the nodal line without spin-orbit coupling. We showed that the Berry curvature diverges near the stationary point, enhancing the anomalous Nernst effect.
We have also reported the logarithmic divergence of the anomalous Nernst effect originating from the Weyl points in a ferromagnetic half-Heusler alloy CoMnSb and the large anomalous Nernst effect in a Kagome-lattice ferromagnet Fe3Sn.

Academic Significance and Societal Importance of the Research Achievements

排熱などの有効利用を目指すエネルギーハーベスティング技術の基礎原理の一つとして熱電効果が知られている。本研究で焦点を当てている異常ネルンスト効果は磁性体において発現し、その起源は電子波動関数の位相に由来している。異常ネルンスト効果は電位差が温度勾配に対して垂直に生じる特徴を有しており、工学応用において様々な利点があることが報告されているが、より大きな応答を示す磁性熱電材料が求められている。本研究の成果として、異常ネルンスト効果を増大させるためのメカニズムとして逆格子空間上で定義されるノーダルラインの停留点近傍の状態密度が重要であり、今後の物質設計の指針の一つとなりうることを明らかにした。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (15 results)

All 2023 2022 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] First-principles calculation of anomalous Hall and Nernst conductivity by local Berry phase2023

    • Author(s)
      H. Sawahata, N. Yamaguchi, S. Minami, and F. Ishii
    • Journal Title

      Physical Review B

      Volume: 107 Issue: 2 Pages: 024404-024404

    • DOI

      10.1103/physrevb.107.024404

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [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 Issue: 49 Pages: 2206519-2206519

    • DOI

      10.1002/adfm.202206519

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Large anomalous Nernst effect and nodal plane in an iron-based kagome ferromagnet2022

    • Author(s)
      Chen Taishi、Minami Susumu、Sakai Akito、Wang Yangming、Feng Zili、Nomoto Takuya、Hirayama Motoaki、Ishii Rieko、Koretsune Takashi、Arita Ryotaro、Nakatsuji Satoru
    • Journal Title

      Science Advances

      Volume: 8 Issue: 2 Pages: 084411-084411

    • DOI

      10.1126/sciadv.abk1480

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous transport properties of the antiferromagnetic Weyl semimetals Mn<sub>3</sub> X (X = Sn, Ge)2022

    • Author(s)
      Tomita Takahiro、Minami Susumu、Ikhlas Muhammad、Nakamura Hiroto、Arita Ryotaro、Nakatsuji Satoru
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 2164 Issue: 1 Pages: 012065-012065

    • DOI

      10.1088/1742-6596/2164/1/012065

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Logarithmic criticality in transverse thermoelectric conductivity of the ferromagnetic topological semimetal CoMnSb2021

    • Author(s)
      Nakamura Hiroto、Minami Susumu、Tomita Takahiro、Nugroho Agustinus Agung、Nakatsuji Satoru
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 16

    • DOI

      10.1103/physrevb.104.l161114

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn3X, X?=?Sn, Ge2021

    • Author(s)
      Chen Taishi、Tomita Takahiro、Minami Susumu、Fu Mingxuan、Koretsune Takashi、Kitatani Motoharu、Muhammad Ikhlas、Nishio-Hamane Daisuke、Ishii Rieko、Ishii Fumiyuki、Arita Ryotaro、Nakatsuji Satoru
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 572-586

    • DOI

      10.1038/s41467-020-20838-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Enhancement of the transverse thermoelectric conductivity originating from stationary points in nodal lines2020

    • Author(s)
      Minami Susumu、Ishii Fumiyuki、Hirayama Motoaki、Nomoto Takuya、Koretsune Takashi、Arita Ryotaro
    • Journal Title

      Physical Review B

      Volume: 102 Issue: 20 Pages: 205128-205128

    • DOI

      10.1103/physrevb.102.205128

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Anomalous Nernst effect in the topological Fe3Ga1-xAlx polycrystals2023

    • Author(s)
      Yangming Wang, Susumu Minami, Akito Sakai, Hao Gu, Taishi Chen, Zili Feng, Daisuke Nishio-Hamane, Satoru Nakatsuji
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 低温異常ネルンスト効果測定による磁気トポロジカル状態の検証2023

    • Author(s)
      中村紘人, 小池祐樹, 見波将, 冨田崇弘, 小池美夏, M. Y. P. Akbar, A. A. Nugroho, 町田洋, 中辻知
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Large anomalous Nernst effect in the iron-based Kagome ferromagnet Fe3Sn2022

    • Author(s)
      Susumu Minami, Akito Sakai, Taishi Chen, Yangming Wang, Zili Feng, Takuya Nomoto, Motoaki Hirayama, Rieko Ishii, Takashi Koretsune, Ryotaro Arita, Satoru Nakatsuji
    • Organizer
      The 15th Asia Pacific Physics Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Logarithmic criticality in the transverse thermoelectric conductivity of the ferromagnetic topological semimetal CoMnSb2022

    • Author(s)
      Hiroto Nakamura, Susumu Minami, Takahiro Tomita, Agustinus Agung Nugroho, Satoru Nakatsuji
    • Organizer
      The 15th Asia Pacific Physics Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 第一原理計算によるカゴメ格子磁性体 Fe3Sn における 異常ネルンスト効果の予測と検証2022

    • Author(s)
      見波将, Taishi Chen , 酒井明人, Yangming Wang, Zili Feng, 野本拓也, 平山元昭, 石井梨恵子, 是常隆, 有田亮太郎, 中辻知
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Logarithmic criticality in transverse thermoelectric conductivity of the ferromagnetic topological semimetal CoMnSb2022

    • Author(s)
      Hiroto Nakamura, Susumu Minami, Takahiro Tomita, Agustinus A Nugroho, Satoru Nakatsuji
    • Organizer
      APS March Meeting 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fe3X (X=Ga, Al)における異常ネルンスト効果の第一原理計算2020

    • Author(s)
      見波将, 是常隆, 野本拓也, 平山元昭, 石井史之, 有田亮太郎
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 強磁性体CoMnSbの磁気熱輸送測定および第一原理計算に基づくトポロジカル状態の検証2020

    • Author(s)
      中村紘人, 見波将, M. Y. P. Akbar, 冨田崇弘, D, A. A. Nugroho, 中辻知
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-09-29   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi