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

Real-space investigation of valley state of spin-valley coupled transition metal dichalcogenides

Research Project

Project/Area Number 16K17730
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics I
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Machida Tadashi  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, 特別研究員 (60570695)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsバレートロ二クス / スピントロ二クス / 遷移金属ダイカルコゲナイド / 走査型トンネル顕微鏡 / 走査トンネル顕微鏡 / 半導体
Outline of Final Research Achievements

We have performed Scanning tunneling microscopy and spectroscopy experiments on spin-valley coupled transition metal dichalcogenides, to investigate the role of not only spin but also orbital degrees of freedom (DOF) on the intra- and inter-valley scattering process. Our experimental results reveal that the signals of the inter-valley scattering are noticeably weaker than those of the intra-valley scattering. To understand the role of spin and orbital DOF on QPI, we performed theoretical simulations with only the spin selection rules and with the selection rules of both DOF. A comparison with the theoretical simulations indicate the necessity of the orbital selection rules to reproduce the observed suppression of inter-valley signals. These findings will provide important information in future application for valleytronics.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (11 results)

All 2017 2016

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Journal Article] Appearance of a Domain Structure and Its Electronic States in Iron Doped 1T-TaS2 Observed Using Scanning Tunneling Microscopy and Spectroscopy2017

    • Author(s)
      Yuita Fujisawa, Tatsunari Shimabukuro, Hiroyuki Kojima, Kai Kobayashi, Shun Ohta, Tadashi Machida, Satoshi Demura and Hideaki Sakata
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 11 Pages: 1-4

    • DOI

      10.7566/jpsj.86.113703

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Full-gap superconductivity in spin-polarised surface states of topological semimetal β-PdBi22017

    • Author(s)
      Iwaya K.、Kohsaka Y.、Okawa K.、Machida T.、Bahramy M. S.、Hanaguri T.、Sasagawa T.
    • Journal Title

      Nature Communications

      Volume: 8 Issue: 1 Pages: 976-983

    • DOI

      10.1038/s41467-017-01209-9

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Orbital-dependent quasiparticle scattering interference in 3R?NbS22017

    • Author(s)
      Machida T.、Kohsaka Y.、Iwaya K.、Arita R.、Hanaguri T.、Suzuki R.、Ochi M.、Iwasa Y.
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 7 Pages: 075206-075206

    • DOI

      10.1103/physrevb.96.075206

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spin-orbit scattering visualized in quasiparticle interference2017

    • Author(s)
      Y. Kohsaka, T. Machida, K. Iwaya, M. Kanou, T. Hanaguri, and T. Sasagawa
    • Journal Title

      Phys. Rev. B

      Volume: 95 Issue: 11 Pages: 115307-115307

    • DOI

      10.1103/physrevb.95.115307

    • NAID

      130006243762

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 黒リンにおける準粒子干渉2017

    • Author(s)
      町田理
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学 (大阪府吹田市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] 黒リンにおけるバルク不純物状態のSTM観察2017

    • Author(s)
      町田理, 高橋敬成, 幸坂祐生, 岩谷克也, 花栗哲郎, 笹川崇男, 永井佑紀
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Orbital-dependent quasiparticle interference in 3R-NbS22017

    • Author(s)
      T. Machida, Y. Kohsaka, R. Suzuki, K. Iwaya, M. Ochi, R. Arita, T. Hanaguri, Y. Iwasa
    • Organizer
      CEMS Topical Meeting on Emergent 2D Materials 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of magnetic field on electronic superstructures in cuprate superconductors2017

    • Author(s)
      T. Machida, Y. Kohsaka, K. Iwaya, K. Matsuoka, T. Hanaguri, T. Tamegai
    • Organizer
      16th International Workshop on Vortex Matter in Superconductors (Vortex2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 黒リンにおける準粒子干渉2017

    • Author(s)
      町田理, 高橋敬成, 幸坂祐生, 岩谷克也, 花栗哲郎, 笹川崇男
    • Organizer
      日本物理学会 第72回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Bipartite electronic superstructures in the vortex core of Bi2Sr2CaCu2O8+δ2017

    • Author(s)
      T. Machida, Y. Kohsaka, K. Matsuoka, K. Iwaya, T. Hanaguri, T. Tamegai
    • Organizer
      CEMS-QPEC Topical Meeting on Superconductivity under Extreme Conditions
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 17.5T-強磁場極低温走査型トンネル顕微鏡の開発と評価2016

    • Author(s)
      町田理
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学(石川県金沢市)
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2019-03-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi