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Theory of Spin and Charge Distributions Controlled by Quantum Dot Systems with Geometric Structure

Research Project

Project/Area Number 25400322
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionShizuoka University

Principal Investigator

KOGA Mikito  静岡大学, 教育学部, 教授 (40324321)

Co-Investigator(Kenkyū-buntansha) MATSUMOTO Masashige  静岡大学, 理学部, 教授 (20281058)
KUSUNOSE Hiroaki  明治大学, 理工学部, 准教授 (00292201)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords量子ドット / 近藤効果 / スピン電荷制御 / 誘起電気分極 / マルチフェロイックス / アハラノフ・ボーム効果 / マルチフェロイクス / 量子臨界点
Outline of Final Research Achievements

We studied the controllability of spin and charge distributions through a quantum effect called "Kondo effect", using a triangular triple-quantum-dot system in which each quantum dot is regarded as an artificial atom. In the field of nanotechnology, we introduce a new aspect of multiferroics, for instance, a magnetic-field control of electric polarization.
The main results are as follows: (1) a sign reversal of emergent electric polarization through a competition between two quantum states; (2) field control of oscillation patterns of emergent electric polarization; (3)a sign reversal of emergent electric polarization through the Kondo effect due to molecular orbitals of the triangular loop.
The above results would contribute to opening up a new area of the Kondo physics.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (14 results)

All 2016 2015 2014 2013 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results,  Acknowledgement Compliant: 3 results) Presentation (6 results) Remarks (3 results)

  • [Journal Article] SU(2)-SU(4) Kondo Crossover and Emergent Electric Polarization in a Triangular Triple Quantum Dot2016

    • Author(s)
      Mikito Koga, Masashige Matsumoto, Hiroaki Kusunose
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 85

    • NAID

      40020851768

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Kondo-induced electric polarization modulated by magnetic flux through a triangular triple quantum dot2015

    • Author(s)
      Mikito Koga, Masashige Matsumoto, Hiroaki Kusunose
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 592 Pages: 012142-012142

    • DOI

      10.1088/1742-6596/592/1/012142

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Triangular Triple Quantum Dot: A Multiferroic Kondo System2014

    • Author(s)
      Mikito Koga, Masashige Matsumoto, Hiroaki Kusunose
    • Journal Title

      JPS Conference Proceedings

      Volume: 3

    • DOI

      10.7566/jpscp.3.012020

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Magnetic Flux Effect on a Kondo-Induced Electric Polarization in a Triangular Triple Quantum Dot2014

    • Author(s)
      Mikito Koga, Masashige Matsumoto, Hiroaki Kusunose
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 83 Issue: 8 Pages: 084707-084707

    • DOI

      10.7566/jpsj.83.084707

    • NAID

      40020158082

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Field-Controlled Spin and Charge Distributions in Kondo System with a Triangular Triple Quantum Dot2013

    • Author(s)
      M. Koga, M. Matsumoto, and H. Kusunose
    • Journal Title

      J. Phys. Soc. Jpn

      Volume: Vol. 82 Issue: 9 Pages: 093706-4

    • DOI

      10.7566/jpsj.82.093706

    • NAID

      40019788397

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 多極子伝導系から多重量子ドット系へ ―近藤効果研究の新展開―2016

    • Author(s)
      古賀幹人、松本正茂、楠瀬博明
    • Organizer
      J-Physics 多極子伝導系の物理: 理論討論会
    • Place of Presentation
      明治大学( 東京都・ 千代田区)
    • Year and Date
      2016-06-04
    • Related Report
      2015 Annual Research Report
  • [Presentation] 近藤効果による多重量子ドット系のスピン電荷制御 ―ナノスケール多極子物理の創出に向けて―2016

    • Author(s)
      古賀幹人、松本正茂、楠瀬博明
    • Organizer
      J-Physics 多極子伝導系の物理 平成28年度 領域全体会議
    • Place of Presentation
      北海道大学( 北海道・ 札幌市)
    • Year and Date
      2016-05-26
    • Related Report
      2015 Annual Research Report
  • [Presentation] 三角形三重量子ドットループ内磁束による近藤誘起電気分極の制御2015

    • Author(s)
      古賀幹人、松本正茂、楠瀬博明
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学早稲田キャンパス(東京都)
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] Kondo and magnetic flux controlled electric dipole in a triangular triple quantum dot2014

    • Author(s)
      Mikito Koga, Masashige Matsumoto, Hiroaki Kusunose
    • Organizer
      The International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      グルノーブル大学サン・マルタン・デール・キャンパス(フランス)
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Triangular Triple Quantum Dot: A Multiferroic Kondo System2013

    • Author(s)
      Mikito Koga, Masashige Matsumoto, Hiroaki Kusunose
    • Organizer
      The International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      東京大学本郷キャンパス(東京都)
    • Related Report
      2013 Research-status Report
  • [Presentation] 近藤効果と外場による三角形三重量子ドット内スピン・電荷分布の制御2013

    • Author(s)
      古賀幹人、松本正茂、楠瀬博明
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学常三島キャンパス(徳島県)
    • Related Report
      2013 Research-status Report
  • [Remarks] 静岡大学: 教員データベース ― 古賀幹人 ( KOGA Mikito)

    • URL

      https://tdb.shizuoka.ac.jp/RDB/public/Default2.aspx?id=10102&l=0

    • Related Report
      2015 Annual Research Report
  • [Remarks] 最新ニュース・ トピックス|静岡大学教育学部・ 教育学研究科

    • URL

      http://www.ed.shizuoka.ac.jp/688/

    • Related Report
      2015 Annual Research Report
  • [Remarks] 静岡大学最新ニュース・トピックス

    • Related Report
      2013 Research-status Report

URL: 

Published: 2014-07-25   Modified: 2020-05-15  

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