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Spin-polarized surface states of topological Kondo insulator coupled with magnetic single atoms

Research Project

Project/Area Number 20K21119
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 28:Nano/micro science and related fields
Research InstitutionNagoya University (2021-2023)
The University of Electro-Communications (2020)

Principal Investigator

Miyamachi Tosiho  名古屋大学, 未来材料・システム研究所, 准教授 (10437361)

Project Period (FY) 2020-07-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywordsトポロジカル絶縁体 / 走査トンネル顕微鏡 / 近藤効果 / スピン / 磁性単一原子 / 単原子磁石
Outline of Research at the Start

SmB6は近年トポロジカル近藤絶縁体と理論的に予測され、新奇な量子現象の発現が期待されている。本研究ではSmB6(001)表面の極低温STM観察を行い、その構造と電子状態を原子スケールで観察する。特に、磁性単一原子との磁気結合を利用してSmB6(001)表面の近藤状態をナノスケールで局所的に変調させることによって、トポロジカル表面状態と近藤状態の相関を明らかにし、強相関トポロジカル状態の発現機構の理解につなげる。

Outline of Final Research Achievements

We investigated topological surface states of Kondo insulator SmB6 in terms of surface structures and electronic correlation (Kondo effect) by scanning tunneling microscopy (STM). By controlling annealing temperature during sample preparation, we successfully prepared SmB6(001) surfaces with p(1×1), c(2×2) and (3×1) lattices. STM spectroscopic measurements revealed impacts of surface structures on the band gap and band dispersion of surface states both from real- and k-spaces. Furthermore, the role of the electronic correlation on the emergence of topological surface states was investigated from surface-structure dependence of the magnetic interaction between Co single atoms and SmB6(001) surfaces.

Academic Significance and Societal Importance of the Research Achievements

本研究でトポロジカル近藤絶縁体候補物質であるSmB6の金属表面状態をSTMによる原子分解能観察により詳細に調べ、表面構造や磁気相互作用により制御できる可能性が示された。得られた結果から、強相関電子系特有の新奇量子現象の発現の鍵を握るトポロジカル近藤絶縁体のトポロジカル物性の発現機構を理解することによって、超低消費電力で飛躍的に高い電子移動度を持つスピンデバイス創製につながることが期待できる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (51 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (13 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 13 results,  Open Access: 2 results) Presentation (34 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results)

  • [Int'l Joint Research] カールスルーエ工科大学(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] リンツ大学(オーストリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] カールスルーエ工科大学(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Karlsruhe Institute of Technology(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Intermolecular Interaction Induced Magnetic Decoupling at an Organic-Inorganic Interface2023

    • Author(s)
      Ono Hiroki、Umeda Yoshitaka、Yoshida Kaito、Tsutsui Kenzaburo、Yamamoto Kohei、Ishiyama Osamu、Iwayama Hiroshi、Nakamura Eiken、Yokoyama Toshihiko、Mizuguchi Masaki、Miyamachi Toshio
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 49 Pages: 23935-23940

    • DOI

      10.1021/acs.jpcc.3c05966

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Width-dependent band gap of arm-chair graphene nanoribbons formed on vicinal SiC substrates by MBE2023

    • Author(s)
      Iimori Takushi、Miyamachi Toshio、Kajiwara Takashi、Mase Kazuhiko、Tanaka Satoru、Komori Fumio、Nakatsuji Kan
    • Journal Title

      Journal of Physics: Condensed Matter

      Volume: 35 Issue: 45 Pages: 455002-455002

    • DOI

      10.1088/1361-648x/aced30

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Layer-resolved magnetic moments in N-surfactant assisted FeNi ordered alloy thin films2022

    • Author(s)
      Kawaguchi K.、Miyamachi T.、Gozlinski T.、Iimori T.、Takahashi Y.、Hattori T.、Yamamoto K.、Koitaya T.、Iwayama H.、Ishiyama O.、Nakamura E.、Kotsugi M.、Wulfhekel W.、Yokoyama T.、Komori F.
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SL Pages: SL1001-SL1001

    • DOI

      10.35848/1347-4065/ac66c1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation of graphene nanoribbons on the macrofacets of vicinal 6H-SiC(0001) surfaces2022

    • Author(s)
      Fukuma Kohei、Visikovskiy Anton、Iimori Takushi、Miyamachi Toshio、Komori Fumio、Tanaka Satoru
    • Journal Title

      Physical Review Materials

      Volume: 6 Issue: 12

    • DOI

      10.1103/physrevmaterials.6.124003

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Structural and electrical characterization of the monolayer Kondo-lattice compound CePt6/Pt(111)2021

    • Author(s)
      Koichiro Ienaga, Sunghun Kim, Toshio Miyamachi, Fumio Komori
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 16 Pages: 165419-165419

    • DOI

      10.1103/physrevb.104.165419

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Resolving the spin polarization and magnetic domain wall width of (Nd,Dy)2Fe14B with spin-polarized scanning tunneling microscopy2021

    • Author(s)
      T. Miyamachi, C. Surgers, W. Wulfhekel
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 11 Pages: 115504-115504

    • DOI

      10.35848/1882-0786/ac2a56

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electronic structure of 3°-twisted bilayer graphene on 4H-SiC(0001)2021

    • Author(s)
      Takushi Iimori, Anton Visikovskiy, Hitoshi Imamura, Toshio Miyamachi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Kazuhiko Mase, Kan Nakatsuji, Satoru Tanaka, Fumio Komori
    • Journal Title

      Physical Review Materials

      Volume: 5 Issue: 5

    • DOI

      10.1103/physrevmaterials.5.l051001

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spatial Control of Charge Doping in n-Type Topological Insulators2021

    • Author(s)
      Sakamoto Kazuyuki、Ishikawa Hirotaka、Wake Takashi、Ishimoto Chie、Fujii Jun、Bentmann Hendrik、Ohtaka Minoru、Kuroda Kenta、Inoue Natsu、Hattori Takuma、Miyamachi Toshio、Komori Fumio、Yamamoto Isamu、Fan Cheng、Kr?ger Peter、Ota Hiroshi、Matsui Fumihiko、Reinert Friedrich、Avila Jos?、Asensio Maria C.
    • Journal Title

      Nano Letters

      Volume: 21 Issue: 10 Pages: 4415-4422

    • DOI

      10.1021/acs.nanolett.1c01100

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Subatomic Distortion of Surface Monolayer Lattice Visualized by Moire Pattern2021

    • Author(s)
      T. Hattori, N. Kawamura, T. Iimori, T. Miyamachi, F. Komori
    • Journal Title

      Nano Letters

      Volume: 6 Issue: 6 Pages: 2406-2406

    • DOI

      10.1021/acs.nanolett.0c04408

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Odd spin frustration in Cr(001) films thinner than three nanometers revealed by spin-polarized scanning tunneling microscopy2021

    • Author(s)
      T. Kawagoe, R. Oka, T. Miyamachi, S. Suga
    • Journal Title

      PHYSICAL REVIEW B

      Volume: 103 Issue: 8 Pages: 085427-085427

    • DOI

      10.1103/physrevb.103.085427

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Twisted bilayer graphene fabricated by direct bonding in a high vacuum2020

    • Author(s)
      Hitoshi Imamura, Anton Visikovskiy, Ryosuke Uotani, Takashi Kajiwara, Hiroshi Ando, Takushi Iimori, Kota Iwata, Toshio Miyamachi, Kan Nakatsuji, Kazuhiko Mase, Tetsuroh Shirasawa, Fumio Komori, Satoru Tanaka
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 7 Pages: 075004-075004

    • DOI

      10.35848/1882-0786/ab99d1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Realizing large out-of-plane magnetic anisotropy in L10-FeNi films grown by nitrogen- surfactant epitaxy on Cu(001)2020

    • Author(s)
      K. Kawaguchi, T. Miyamachi, T. Iimori, Y. Takahashi, T. Hattori, T. Yokoyama, M. Kotsugi, F. Komori
    • Journal Title

      PHYSICAL REVIEW MATERIALS

      Volume: 4 Issue: 5 Pages: 054403-054403

    • DOI

      10.1103/physrevmaterials.4.054403

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hexagonal iron nitride monolayer on Cu (001): zigzag-line-in-trough alignment2020

    • Author(s)
      M. Yamada, K. Ienaga, Y. Takahashi, T. Miyamachi, and F. Komori
    • Journal Title

      Surface Science

      Volume: 700 Pages: 121679-121679

    • DOI

      10.1016/j.susc.2020.121679

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] CoPc/γ'-Fe4N 有機-無機ハイブリッド薄膜磁気状態に及ぼす構造粗さの影響2024

    • Author(s)
      小野広喜, 梅田佳孝, 吉田海斗, 筒井健三郎, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      IEEE Magnetics Society 名古屋支部若手研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 雰囲気制御型硬X線光電子分光によるPd/Ni薄膜ヘテロ構造の水素吸蔵特性その場観察2024

    • Author(s)
      筒井健三郎, 小野広喜, 河添理央, 山本航平, 石山修, 徐玉均, 中辻寛, 高木康多, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第71回応用物理学会 秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Atomic-scale surface and interface magnetism based on ferromagnetic monatomic layer iron nitrid2023

    • Author(s)
      Toshio Miyamachi
    • Organizer
      第47回 日本磁気学会学術講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Local strain induced structural and electronic inhomogeneity in Fe thin films on Cu(001)2023

    • Author(s)
      T. Miyamachi, S. Nakashima, Y. Takagi, T. Yokoyama, and F. Komori
    • Organizer
      31st International Colloquium on Scanning Probe Microscopy (ICSPM31)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Atomic-scale interface structures of FeCo alloy thin films on Cu(001) grown by nitrogen surfactant epitaxy2023

    • Author(s)
      T. Miyamachi, Y. Umeda, H. Ono, K. Kawaguchi, T. Gozkinski3,4, T. Iimori, K. Yamamoto, W. Wulfhekel, T. Yokoyama, F. Komori, and M. Mizuguchi
    • Organizer
      International Conference on Materials and Systems for Sustainability 2023 (ICMaSS2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 界面磁気結合を利用したPd/Ni薄膜ヘテロ構造の磁気特性制御2023

    • Author(s)
      筒井健三郎, 小野広喜, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第84回応用物理学会 秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] H2Pc/γ'-Fe4N 有機-無機ハイブリッド界面磁気結合の膜厚依存性2023

    • Author(s)
      小野広喜, 梅田佳孝, 吉田海斗, 筒井健三郎, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第84回応用物理学会 秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 有機-無機ハイブリッド界面磁気結合に及ぼす分子間相互作用の影響の評価2023

    • Author(s)
      小野広喜, 梅田佳孝, 吉田海斗, 筒井健三郎, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      UVSOR Symposium2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Impacts of magnetic ion in Pc molecules on the magnetic coupling with iron nitride substrate2023

    • Author(s)
      H. Ono, Y. Umeda, K. Yoshida, K. Tsutsui, K. Yamamoto, O. Ishiyama, T. Yokoyama, M. Mizuguchi, T. Miyamachi
    • Organizer
      International Conference on Materials and Systems for Sustainability 2023 (ICMaSS2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Enhancement of perpendicular magnetic anisotropy in Co nano-islands by the formation of C70-Co organic-inorganic hybrid interface2023

    • Author(s)
      K. Yoshida, H. Ono, Y. Umeda, K. Tsutsui, K. Yamamoto, O. Ishiyama, Y. Matsuo, T. Yokoyama, M. Mizuguchi, T. Miyamachi
    • Organizer
      31st International Colloquium on Scanning Probe Microscopy (ICSPM31)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Annealing temperature dependence of magnetic properties in FeCo ordered alloy thin films fabricated using the nitrogen surfactant effect2023

    • Author(s)
      Y. Umeda, H. Ono, K. Yamamoto, O. Ishiyama, T. Yokoyama, M. Mizuguchi, T. Miyamachi
    • Organizer
      31st International Colloquium on Scanning Probe Microscopy (ICSPM31)
    • Related Report
      2023 Annual Research Report
  • [Presentation] CoPc-γ’-Fe4N有機-無機ハイブリッド界面における電子軌道依存磁気特性2023

    • Author(s)
      小野広喜, 梅田佳孝, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 窒素サーファクタント効果を用いて作製したFeCo規則合金薄膜の磁気異方性と原子スケール界面構造2023

    • Author(s)
      梅田佳孝, 小野広喜, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Metallic surface states on structurally controlled SmB6(001)2022

    • Author(s)
      T. Miyamachi, S. Suga, T. Iimori, F. Iga, and F. Komori
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Controlling metallic surface states on SmB6(001) by surface reconstruction2022

    • Author(s)
      T. Miyamachi, S. Suga, T. Iimori, F. Iga, and F. Komori
    • Organizer
      the 22nd International Vacuum Congress
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Magnetic properties of CoPc/γ’-Fe4N organic-inorganic hybrid thin films2022

    • Author(s)
      H. Ono, Y. Umeda, K. Yamamoto, O. Ishiyama, T. Yokoyama, M. Mizuguchi, and T. Miyamachi,
    • Organizer
      the 22nd International Vacuum Congress
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structural and magnetic properties of FeNi and FeCo alloy thin films on Cu(001) grown by nitrogen surfactant epitaxy2022

    • Author(s)
      T. Miyamachi, H. Ono, Y. Umeda, K. Kawaguch, T. Gozlinski, T. Iimori, K. Yamamoto, M. Kotsugi, W. Wulfhekel ,T. Yokoyama ,F. Komori, and M. Mizuguchi
    • Organizer
      The 2nd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture (DEJI2MA)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structure and magnetic properties of organic-inorganic heterointerface2022

    • Author(s)
      小野広喜, 梅田佳孝, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第5回日本表面真空学会若手部会研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] Pt(111)上のCePt2単原子層の成長と電子状態2022

    • Author(s)
      家永紘一郎, 金聖憲, 宮町俊生, 加藤弘一, 小森文夫
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] SiC基板上の1度以下のツイスト2層グラフェンの電子状態2022

    • Author(s)
      飯盛拓嗣, 今村均, 宮町俊生, 中辻寛, 北村未歩, 堀場弘司, 間瀬一彦, Visikovskiy Anton, 田中悟, 小森文夫
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] CoPc/γ'-Fe4N 有機-無機ハイブリッド薄膜の界面磁気状態2022

    • Author(s)
      小野広喜, 梅田佳孝, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 窒素サーファクタント効果により作製した L10-FeCo 規則合金薄膜の界面磁気結合状態の制御2022

    • Author(s)
      梅田佳孝, 小野広喜, 山本航平, 石山修, 横山利彦, 水口将輝, 宮町俊生
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Anomalous Nernst effect in Co/Au/Fe trilayer thin films2022

    • Author(s)
      Hiroki Fukuda, Toshio Miyamachi, Masaki Mizuguchi
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Anomalous Nernst and Hall effects in Ge-doped Co thin films2022

    • Author(s)
      Takuya Tsujimoto, Toshio Miyamachi, Masaki Mizuguchi
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] スピン偏極STMによるNdFeB磁石の磁壁幅の実空間・高分解能観察2022

    • Author(s)
      宮町俊生, Wulf Wulfhekel
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 3nm厚のCr(001)薄膜で観測された特異なスピンフラストレーション2021

    • Author(s)
      川越毅, 宮町俊生, 菅滋正
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 走査トンネル顕微分光を用いた2次元近藤格子CePt6/Pt(111)の電子状態観測2021

    • Author(s)
      家永紘一郎, 金聖憲, 宮町俊生, 小森文夫
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 大面積数度ツイストグラフェンの電子状態2021

    • Author(s)
      飯盛拓嗣, 今村均, 宮町俊生, 服部琢磨, 中辻寛, 北村未歩, 堀場弘司, 間瀬一彦, Visikovskiy Anton, 田中悟, 小森文夫
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 単層近藤格子CePt2/Pt(111)の構造と電子状態2021

    • Author(s)
      家永紘一郎, 金聖憲, 宮町俊生, 小森文夫
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Resolving the spin polarization and magnetic domain wall width of (Nd, Dy)2Fe14B with spin-polarized scanning tunneling microscopy2021

    • Author(s)
      Toshio Miyamachi, Wulfhekel Wulf
    • Organizer
      ICMaSS2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Challenges in the application of spin-polarized STM to materials science2021

    • Author(s)
      Toshio Miyamachi
    • Organizer
      The 29th International Colloquium on Scanning Probe Microscopy
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 窒素サーファクタント効果により作製したFeCo合金超薄膜の構造と磁気状態2021

    • Author(s)
      宮町俊生, 高橋優樹, 飯盛拓嗣, 服部卓磨, 山本航平, 小板谷貴典, 横山利彦, 小嗣真人, 小森文夫
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Published: 2020-08-03   Modified: 2025-01-30  

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