Theoretical study on interplays of quantum interference and inter-electron interaction in nanoscale and mesoscale systems
Project/Area Number |
26400319
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics I
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Research Institution | Osaka City University |
Principal Investigator |
Oguri Akira 大阪市立大学, 大学院理学研究科, 教授 (10204166)
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Co-Investigator(Renkei-kenkyūsha) |
SAKANO RUI 東京大学, 物性研, 助教 (00625022)
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Research Collaborator |
TANAKA YOICHI 株式会社先端力学シミュレーション研究所, 主任
Hewson A. C. Imperial College London, Department of Mathematics, Senior Research Investigator
TERATANI YOSHIMICHI 大阪市立大学, 大学院理学研究科, 大学院生
NAKATA YUKIHIRO 大阪市立大学, 大学院理学研究科, 大学院生
KOIKE NORITAKA 大阪市立大学, 大学院理学研究科, 大学院生
MATSUMOTO RYUTA 大阪市立大学, 大学院理学研究科, 大学院生
MATSUMOTO MASAYA 大阪市立大学, 大学院理学研究科, 大学院生
MATSUMOTO YUTA 大阪市立大学, 大学院理学研究科, 大学院生
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Project Period (FY) |
2014-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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Keywords | 物性理論 / 量子ドット / 近藤効果 / フェルミ流体 / 電子相関 / 電流ゆらぎ / 非平衡 / 国際情報研究 / 国際情報協力 / 国際情報交換 |
Outline of Final Research Achievements |
We have microscopically extended the Fermi-liquid theory for quantum dots and magnetic impurities in metals to explore low-energy non-equilibrium transport away from the particle-hole symmetric point. It reveals that the leading finite-temperature and finite-bias-voltage corrections to the transport coefficients are determined by the linear and non-linear-three-body susceptibilities of impurity electrons. Our field-theoretical description gives a clear answer to the long-standing problem, and can be applied to a wide class of Kondo systems and other strongly correlated electron systems. We have also studied a magnetic-field induced crossover from the SU(4) to SU(2) Kondo state observed in carbon nanotube quantum dots. Our results for the conductance and excitation spectrum, obtained by using the numerical renormalization group approach, agree reasonably with the experiments, which suggests the crossover is caused by a cancellation of the spin and orbital Zeeman splittings.
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Report
(5 results)
Research Products
(69 results)
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[Presentation] 近藤効果が発現する量子ドット-超伝導接合系における0-π転移の観測2018
Author(s)
秦徳郎, Meydi Ferrier, , 荒川智紀, 小林研介, R. Delagrange, R. Deblock, H. Bouchiat, 樋口裕太, 寺谷義道, 小栗章
Organizer
日本物理学2018年会 (東京理科大 野田キャンパス, 3.22-3.25 )
Related Report
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[Presentation] Shot noise of a superconductor/nanotube junction in the SU(2) and SU(4) Kondo regime2017
Author(s)
T. Hata, M. Ferrier, S. H. Lee, T. Arakawa, R. Delagrange, R. Deblock, R. Sakano, A. Oguri, and K. Kobayashi
Organizer
Nanophysics, from fundamental to applications: reloaded (July 30-August 5 2017, Quy Nhon, Vietnam)
Related Report
Int'l Joint Research
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[Presentation] 近藤効果が発現する量子ドットにおける励起スペクトル2016
Author(s)
秦徳郎, Meydi Ferrier, , 荒川智紀, 小林研介, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, 阪野塁, 寺谷義道, 小栗章
Organizer
日本物理学会2016年秋季大会
Place of Presentation
金沢大学 角間キャンパス (石川県金沢市)
Year and Date
2016-09-13
Related Report
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[Presentation] Shot Noise Measurement and Theoretical Analysis on Carbon Nanotube Quantum Dot2015
Author(s)
Ryosuke Yoshii, Ryo Fujiwara, Tokuro Hata, Tomonori Arakawa, Kensuke Kobayashi, Meydi Ferrier, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, Rui Sakano, and Akira Oguri
Organizer
International Conference on Electronic Properties of Two-Dimensional Systems
Place of Presentation
Sendai, Japan
Year and Date
2015-07-26
Related Report
Int'l Joint Research
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[Presentation] Shot noise monitoring of magnetic-field-induced cross-over between SU(4) and SU(2) symmetry of the Kondo effect2015
Author(s)
Meydi Ferrier, Tomonori Arakawa, Tokuro Hata, Ryo Fujiwara, Raphaelle Delagrange, Raphael Weil, Richard Deblock, Rui Sakano, Akira Oguri, and Kensuke Kobayashi
Organizer
International Conference on Electronic Properties of Two-Dimensional Systems
Place of Presentation
Sendai, Japan
Year and Date
2015-07-26
Related Report
Int'l Joint Research
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[Presentation] Shot noise monitoring of the cross-over between SU(4) and SU(2) symmetry of the Kondo effect in a carbon nanotube quantum dot2015
Author(s)
Meydi Ferrier, Tomonori Arakawa, Tokuro Hata, Ryo Fujiwara, Raphaell2 Delagrange, Raphael Weil, Richard Deblock, Rui Sakano, Akira Oguri and Kensuke Kobayashi
Organizer
International Workshop on New Perspectives in Spintronic and Mesoscopic Physic
Place of Presentation
Kashiwa, Chiba, Japan
Year and Date
2015-06-01
Related Report
Int'l Joint Research
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[Presentation] カーボンナノチューブ量子ドットにおけるショットノイズの理論解析2015
Author(s)
吉井涼輔, 藤原亮, 荒川智紀, 秦徳郎, 小林研介, Meydi Ferrier, R. Delagrange, R. Deblock, H. Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会
Place of Presentation
早稲田大学(東京都新宿区)
Year and Date
2015-03-21 – 2015-03-24
Related Report
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[Presentation] カーボンナノチューブ量子ドットにおけるショットノイズ測定2015
Author(s)
藤原亮, 秦徳郎, 吉井涼輔, 荒川智紀, 小林研介, Meydi Ferrier, R. Delagrange, R. Deblock, H. Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会
Place of Presentation
早稲田大学(東京都新宿区)
Year and Date
2015-03-21 – 2015-03-24
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[Presentation] 近藤ドットの線形電流ノイズと電流の普遍性2014
Author(s)
阪野塁, 小栗章, Meydi Ferrier, 荒川智紀, 秦徳郎, 藤原亮, 小林研介
Organizer
日本物理学会
Place of Presentation
中部大学(愛知県春日井市)
Year and Date
2014-09-07 – 2014-09-10
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[Presentation] SU(2)およびSU(4)近藤効果のスケーリングに関する実験的研究2014
Author(s)
Meydi Ferrier, 荒川智紀, 秦徳郎, 藤原亮, 荒川智紀, 小林研介, R. Delagrange, R. Deblock, H. Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会
Place of Presentation
中部大学(愛知県春日井市)
Year and Date
2014-09-07 – 2014-09-10
Related Report
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[Presentation] SU(2)およびSU(4)近藤状態における非平衡電流ゆらぎ2014
Author(s)
荒川智紀, 秦徳郎, 藤原亮, 荒川智紀, 小林研介, Meydi Ferrier, R. Delagrange, R. Deblock, H. Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会
Place of Presentation
中部大学(愛知県春日井市)
Year and Date
2014-09-07 – 2014-09-10
Related Report
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