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Magnon dispersion measurement using compressive sensing for scanning tunneling microscopy

Research Project

Project/Area Number 18K19013
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 29:Applied condensed matter physics and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

HASEGAWA YUKIO  東京大学, 物性研究所, 教授 (80252493)

Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords走査トンネル顕微鏡 / スピン偏極走査トンネル顕微鏡 / 圧縮センシング / マグノン / 非弾性トンネリング
Outline of Final Research Achievements

By utilizing a compressive sensing technique for quasiparticle interference measurements of scanning tunneling microscopy in order to improve the measurement efficiency and thus shortening the measurement time while maintaining the measurement accuracy, we successfully obtained the energy-dispersion relationship of the surface electronic state. From the imaging of the inelastic tunneling signal by spin-polarized scanning tunneling microscopy, we have successfully observed standing waves of magnons and measured the energy-dispersion relationship of their wavenumbers.

Academic Significance and Societal Importance of the Research Achievements

磁性体の物性評価において重要な知見であるマグノンのエネルギー分散関係の測定には、主として、中性子による非弾性散乱が用いられるが、薄膜・ナノ構造に対しては信号強度が足らず不可能である。そうした状況において、STMによる非弾性トンネル分光により磁性薄膜・ナノ構造体での測定が可能となれば、その磁気相互作用やダイナミクスに関する知見が得られることとなり学術的意義は高い。
加えて、圧縮センシングによる計測を準粒子干渉計測に対して実現できた点も、物性研究への展開の端緒となるものとして意義深い。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (18 results)

All 2019 2018

All Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 10 results,  Invited: 10 results)

  • [Journal Article] Defect-induced electronic structures on SnSe surface2019

    • Author(s)
      Kanta Asakawa, Fumikazu Oguro, Yasuo Yoshida, Hideaki Sakai, Noriaki Hanasaki, Yukio Hasegawa
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SI Pages: SIIA06-SIIA06

    • DOI

      10.7567/1347-4065/ab147d

    • NAID

      210000156432

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Scanning tunneling microscopy on cleaved Mn 3Sn(0001) surface2019

    • Author(s)
      Hung-Hsiang Yang, Chi-Cheng Lee, Yasuo Yoshida, Muhammad Ikhlas, Takahiro Tomita, Nugroho Agung Agustinus, Taisuke Ozaki, Satoru Nakatsuji, Yukio Hasegawa
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 9677-9677

    • DOI

      10.1038/s41598-019-45958-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 走査トンネル顕微鏡による軌道秩序の直接観察:物質表面に現れる新たな秩序2019

    • Author(s)
      吉田靖雄、Howon Kim、Chi-Cheng Lee、長谷川幸雄
    • Journal Title

      固体物理

      Volume: 54 Pages: 19-28

    • NAID

      40022054544

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Nanoscale Magnetic Imaging2019

    • Author(s)
      Hasegawa Yukio、Haze Masahiro、Yoshida Yasuo
    • Journal Title

      Reference Module in Materials Science and Materials Engineering

      Volume: 1 Pages: 53-66

    • DOI

      10.1016/b978-0-12-803581-8.10437-0

    • ISBN
      9780128122969
    • Related Report
      2018 Research-status Report
  • [Journal Article] Bulk ferromagnetic tips for spin-polarized scanning tunneling microscopy2019

    • Author(s)
      Haze Masahiro、Yang Hung-Hsiang、Asakawa Kanta、Watanabe Nobuyuki、Yamamoto Ryosuke、Yoshida Yasuo、Hasegawa Yukio
    • Journal Title

      Review of Scientific Instruments

      Volume: 90 Issue: 1 Pages: 0137041-5

    • DOI

      10.1063/1.5063759

    • NAID

      120006607263

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Role of one-dimensional defects in the electrical transport through Si(111) - 7×7 surface states2019

    • Author(s)
      Hamada Masayuki, Hasegawa Yukio
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 12 Pages: 1254021-5

    • DOI

      10.1103/physrevb.99.125402

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unconventional superconductivity in the single-atom-layer alloy Si(111)-√3×√3-(Tl,Pb)2018

    • Author(s)
      Nakamura T.、Kim H.、Ichinokura S.、Takayama A.、Zotov A. V.、Saranin A. A.、Hasegawa Y.、Hasegawa S.
    • Journal Title

      Physical Review B

      Volume: 98 Issue: 13 Pages: 1345051-6

    • DOI

      10.1103/physrevb.98.134505

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 走査プローブ顕微鏡による物性研究2018

    • Author(s)
      長谷川幸雄
    • Journal Title

      固体物理

      Volume: 53 Pages: 575-585

    • Related Report
      2018 Research-status Report
  • [Presentation] Roles of structural defects on vortices in atomically-thin superconductors2019

    • Author(s)
      Yukio Hasegawa
    • Organizer
      Vortex 2019 conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Real-space observation of surface orbital order by scanning tunneling microscopy2019

    • Author(s)
      Yukio Hasegawa, Yasuo Yoshida, and Howon Kim
    • Organizer
      The 10th International Conference on Materials for Advanced Technologies (ICMAT 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Surface states superconductivity by scanning tunneling microscopy2019

    • Author(s)
      Yukio Hasegawa
    • Organizer
      Nano- And Ultrafast Surface Sciences (NUSS) Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Superconductivity at Surfaces Studied by Scanning Tunneling Microscopy2019

    • Author(s)
      Yukio Hasegawa
    • Organizer
      47th Conference on the Physics and Chemistry of Surfaces and Interfaces (PCSI-47)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Superconductivity at Surfaces studied by Scanning Tunneling Microscopy2019

    • Author(s)
      Yukio Hasegawa
    • Organizer
      2020 Annual Meeting of the Physical Society of Taiwan
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Real-space Observation of Surface-assisted Orbital Order by Scanning Tunneling Microscopy2018

    • Author(s)
      Yukio Hasegawa
    • Organizer
      International Conference on Multi-Condensate Superconductivity and Superfluidity in Solids and Ultra-cold Gases
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Gap-dependent imaging in scanning tunneling microscopy2018

    • Author(s)
      Yukio Hasegawa
    • Organizer
      The 2018 International Conference on Nanoscience + Technology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Real-space observation of surface orbital order by STM2018

    • Author(s)
      Yukio Hasegawa, Yasuo Yoshida, and Howon Kim
    • Organizer
      International Workshop: New Developments in STM on Surfaces of Functional Materials
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Real-space observation of surface orbital order by scanning tunneling microscopy2018

    • Author(s)
      Yukio Hasegawa, Yasuo Yoshida, and Howon Kim
    • Organizer
      The 3rd Asia-Pacific Symposium on Solid Surfaces & Cross-Strait Symposium on Solid Surfaces
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Surface-induced orbital ordering in a strongly-correlated superconductor revealed by gap-dependent scanning tunneling microscopy2018

    • Author(s)
      Y. Yoshida, H. Kim, C.-C. Lee, T.-R. Chang, H.-T. Jeng, H. Lin, Y. Haga, Z. Fisk and Y. Hasegawa
    • Organizer
      14th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2018-07-25   Modified: 2021-02-19  

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