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2008 Fiscal Year Final Research Report

MANY BODY EFFECTS AND INTERFERENCE IN QUANTUM-DOT SYSTEMS

Research Project

  • PDF
Project/Area Number 19540338
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics I
Research InstitutionKyoto University

Principal Investigator

KAWAKAMI Norio  Kyoto University, 大学院・理学研究科, 教授 (10169683)

Project Period (FY) 2007 – 2008
Keywordsメゾスコピック系・局在 / 量子ドット / 理論
Research Abstract

本課題では量子ドットをベースとしたナノ量子複合系の電子相関と干渉効果の理論的研究を行った。特に、スピンおよび軌道自由度に起因する量子特性をアンダーソンモデルの厳密解、NCA近似などを用いて明らかにした。その結果、多軌道効果、近藤効果、干渉効果が織りなす新奇な輸送特性を見出した。さらに超伝導リードと結合した量子ドット系を考察し、近藤効果と超伝導相関の競合により生み出される多体効果を明らかにした。

  • Research Products

    (22 results)

All 2009 2008 2007 Other

All Journal Article (8 results) (of which Peer Reviewed: 6 results) Presentation (13 results) Remarks (1 results)

  • [Journal Article] Andreev Reflection and the Kondo Effect in Side-Coupled Double Quantum Dots2009

    • Author(s)
      Y. Tanaka, N. Kawakami and A. Oguri
    • Journal Title

      J. Physics : Conference Series 150(in press)

    • Peer Reviewed
  • [Journal Article] Nonequilibrium Transport through a Quantum Dot Coupled to Normal and Super conducting Leads2009

    • Author(s)
      Y. Yamada, Y. Tanaka and N. Kawakami
    • Journal Title

      J. Physics : Conference Series 150

      Pages: 022101

    • Peer Reviewed
  • [Journal Article] Andreev Transport through Side-Coupled Double Quantum Dots2008

    • Author(s)
      Y. Tanaka, N. Kawakami and A. Oguri
    • Journal Title

      Phys. Rev. B78

      Pages: 035444/1-6

    • Peer Reviewed
  • [Journal Article] Andreev transport through doublequantum dots ; Numerical renormalization group approach2008

    • Author(s)
      Y. Tanaka, N. Kawakami and A. Oguri
    • Journal Title

      Physica E40

      Pages: 1618-1620

    • Peer Reviewed
  • [Journal Article] Numerical Renormalization Group Approach to a Quantum Dot Coupled to Normal and Superconducting Leads2007

    • Author(s)
      Y. Tanaka, N. Kawakami and A. Oguri
    • Journal Title

      J. Phys. Soc. Jpn Vol.76

      Pages: 074701/1-9

    • Peer Reviewed
  • [Journal Article] Thermopower of Multiorbital Kondo Effect via Single Quantum Dot System at Finite Temperatures2007

    • Author(s)
      R.Sakano, T. Kita and N. Kawakami
    • Journal Title

      J. Phys. Soc. Jpn. Vol.76

      Pages: 074709/1-7

    • Peer Reviewed
  • [Journal Article] Transport Properties of the Orbital Kondo Effect via Quantum DSystems with Plural Electrons2007

    • Author(s)
      R.Sakano, T.Kita, T. Ohashi, S. Suga and N. Kawakami
    • Journal Title

      Phys. Stat. Sol. Vol.204

      Pages: 492-495

  • [Journal Article] Magnetic Field Effects on the Andreev Transport Through a Quantum Dot2007

    • Author(s)
      Y. Yamada, Y. Tanaka and N. Kawakami
    • Journal Title

      Physica E40

      Pages: 265-268

  • [Presentation] 有限バイアス電圧下における量子ドット系でのアンドレーエフ反射と近藤効果2009

    • Author(s)
      山田康博, 田中洋一, 川上則雄
    • Organizer
      日本物理学会「第64回年次大会」
    • Place of Presentation
      立教大(東京)
    • Year and Date
      2009-03-30
  • [Presentation] Andreev Reflection and the Kondo Effect in Side-Coupled Double Quantum Dots2008

    • Author(s)
      Y. Tanaka, N. Kawakami and A. Oguri
    • Organizer
      25th International Conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam, Netherland
    • Year and Date
      20080806-13
  • [Presentation] Nonequilibrium Transport through a Quantum Dot Coupled to Normal and Super conducting Leads2008

    • Author(s)
      Y. Yamada, Y. Tanaka and N. Kawakami
    • Organizer
      25th International Conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam, Netherland
    • Year and Date
      20080806-13
  • [Presentation] 超伝導/常伝導リードに繋がれた量子ドット系における非平衡定常状態での近藤効果2008

    • Author(s)
      山田康博, 田中洋一, 川上則雄
    • Organizer
      日本物理学会「秋季大会」岩手大学
    • Place of Presentation
      盛岡
    • Year and Date
      2008-09-21
  • [Presentation] T字型ダブルドット系における長距離的な近藤効果2008

    • Author(s)
      田中洋一, 川上則雄, 小栗章
    • Organizer
      日本物理学会「秋季大会」岩手大学
    • Place of Presentation
      盛岡
    • Year and Date
      2008-09-21
  • [Presentation] 量子ドット系におけるアンドレーエフ反射と非平衡輸送特性II2008

    • Author(s)
      山田康博, 田中洋一, 川上則雄
    • Organizer
      日本物理学会「第63回年次大会」
    • Place of Presentation
      近畿大学(大阪)
    • Year and Date
      2008-03-24
  • [Presentation] T字型ダブルドット系におけるアンドレーエフ反射と近藤効果2008

    • Author(s)
      田中洋一, 川上則雄, 小栗章
    • Organizer
      日本物理学会「第63回年次大会」
    • Place of Presentation
      近畿大学(大阪)
    • Year and Date
      2008-03-24
  • [Presentation] Andreev transport through doublequantum dots ; Numerical renormalization group approach2007

    • Author(s)
      Y. Tanaka, N. Kawakami and A. Oguri
    • Organizer
      approach" Physica E40 (2008) 1618-1620 International Conference on Electronic Properties of Two-dimensional Systems and Modulated Semiconductor Structures
    • Place of Presentation
      Genova, Italy
    • Year and Date
      20070715-17
  • [Presentation] Enhanced thermpower of Kondo effect in side-coupled quantum dot systems2007

    • Author(s)
      R. Sakano and N. Kawakami
    • Organizer
      International Conference on Electronic Properties of Two-dimensional Systems and Modulated Semiconductor Structures
    • Place of Presentation
      Genova, Italy
    • Year and Date
      20070715-17
  • [Presentation] 量子ドット系におけるアンドレーエフ反射と非平衡輸送特性2007

    • Author(s)
      山田康博, 田中洋一, 川上則雄
    • Organizer
      日本物理学会「第62回年次大会」
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2007-09-24
  • [Presentation] 超伝導/常伝導リードに繋がれたT字型ダブルドット系の輸送特性2007

    • Author(s)
      田中洋一, 川上則雄, 小栗章
    • Organizer
      日本物理学会「第62回年次大会」
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2007-09-24
  • [Presentation] 軌道自由度を有した量子ドット系における非平衡近藤効果と輸送2007

    • Author(s)
      阪野塁, 川上則雄
    • Organizer
      日本物理学会「第62回年次大会」
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2007-09-22
  • [Presentation] Orbital Kondo Effects in Quantum Dot Systems2007

    • Author(s)
      Norio Kawakami
    • Organizer
      (invited) International Workshop on Physics and Mathematics of Interacting Quantum Systems in Low Dimensions
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2007-05-26
  • [Remarks]

    • URL

      http://cond.scphys.kyoto-u.ac.jp/

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Published: 2010-06-10   Modified: 2016-04-21  

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