量子ホール接合系における分数電荷準粒子の生成・消滅過程の研究

• Project Area: Synergy of Fluctuation and Structure:Foundation of Universal Laws in Nonequilibrium Systems
• Project/Area Number: 26103508
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: 橋坂 昌幸 東京工業大学, 理工学研究科, 助教 (80550649)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000); Fiscal Year 2015: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2014: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
• Keywords: 分数量子ホール効果 / 分数電荷準粒子 / 電流ゆらぎ測定 / 朝永ラッティンジャー液体 / 量子ホール効果

Outline of Annual Research Achievements

分数量子ホール系における素励起はラフリン準粒子と呼ばれ、素電荷eよりも小さな分数電荷を持つ。本課題では、この分数電荷準粒子の生成ダイナミクスを実験的に調べた。整数量子ホール系に埋め込まれた局所的な分数量子ホール系を用いて、分数電荷準粒子が生成される過程を電流ゆらぎ測定によって観測した。
1. 磁場や温度などのパラメータに対する準粒子生成現象の依存性を測定し、この現象に量子ホール系エッジ状態における電荷ダイナミクスが関わっていることを明らかにした。このダイナミクスは朝永ラッティンジャー液体モデルによってよく説明されることが分かった。
2. 上記の結果を踏まえ、整数エッジ状態を用いて朝永ラッティンジャー液体中の電荷ダイナミクスの観察を行った。並走する2本の整数エッジ状態は、スピンフルなカイラル朝永ラッティンジャー液体とみなすことができる。そこでの輸送現象は、1次元電子系特有の電荷スピン分離現象によって説明される。本研究では、この電荷スピン分離現象の直接観察に初めて成功した。
3. 量子ホールエッジ状態を利用した電荷密度波干渉計を開発した。これは将来のプラズモニクスにおける有用なデバイスと位置付けられる。
4. 電流ゆらぎ測定を用いた電子系に対するエネルギー分光測定手法を開発した。これは従来とは異なる新しい非平衡現象の研究ツールであり、非平衡電流ゆらぎの研究にとって大いに有用であると期待される。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Waveform measurement of charge- and spin-density wavepackets in a chiral Tomonaga-Luttinger liquid (2017)
  • Author(s): M. Hashisaka, N. Hiyama, T. Akiho, K. Muraki, T. Fujisawa
  • Journal Title: Nature Physics Volume: 印刷中 Issue: 6 Pages: 1-5
  • DOI: 10.1038/nphys4062
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Long-lived binary tunneling spectrum in the quantum Hall Tomonaga-Luttinger liquid (2016)
  • Author(s): K. Washio, R. Nakazawa, M. Hashisaka, K. Muraki, Y. Tokura, and T. Fujisawa
  • Journal Title: Physical Review B Volume: 93 Issue: 7
  • DOI: 10.1103/physrevb.93.075304
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 局所分数量子ホール系における分数電荷準粒子のトンネル現象 (2016)
  • Author(s): 橋坂昌幸, 太田智明, 村木康二, 藤澤利正
  • Journal Title: 固体物理 Volume: 51 Pages: 127-138
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] An edge-magnetoplasmon Mach-Zehnder interferometer (2015)
  • Author(s): N. Hiyama, M. Hashisaka, and T. Fujisawa
  • Journal Title: Applied Physics Letters Volume: 107 Issue: 14 Pages: 143101-143101
  • DOI: 10.1063/1.4932111
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Enhanced electron-phonon coupling for a semiconductor charge qubit in a surface phonon cavity (2015)
  • Author(s): J. C. H. Chen, Y. Sato, R. Kosaka, M. Hashisaka, K. Muraki, and T. Fujisawa
  • Journal Title: Sci. Rep. Volume: 5 Issue: 1 Pages: 15176-15176
  • DOI: 10.1038/srep15176
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Exchange-induced spin blockadein a two-electron double quantum dot (2015)
  • Author(s): D. Imanaka, S. Sharmin, M. Hashisaka, K. Muraki, and T. Fujisawa
  • Journal Title: Physical Review Letters Volume: 115 Issue: 17
  • DOI: 10.1103/physrevlett.115.176802
  • Peer Reviewed
• [Journal Article] Shot-noise evidence of fractional quasiparticle creation in a local fractional quantum Hall state (2015)
  • Author(s): M. Hashisaka, T. Ota, K. Muraki, and T. Fujisawa
  • Journal Title: Phys. Rev. Lett Volume: 114 Issue: 5
  • DOI: 10.1103/physrevlett.114.056802
  • Peer Reviewed
• [Journal Article] Cross-correlation measurement of quantum shot noise using homemade transimpedance amplifiers (2014)
  • Author(s): Masayuki Hashisaka, Tomoaki Ota, Masakazu Yamagishi, Toshimasa Fujisawa, and Koji Muraki
  • Journal Title: Review of Scientific Instruments Volume: 85 Issue: 5
  • DOI: 10.1063/1.4875588
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 量子ホール端における電荷密度波のダイナミクス (2014)
  • Author(s): 橋坂昌幸、鎌田大、藤澤利正、熊田倫雄、村木康二
  • Journal Title: 固体物理 Volume: 49
  • NAID: 40020112596
  • Peer Reviewed
• [Journal Article] Plasmon transport and its guiding in graphene (2014)
  • Author(s): N. Kumada, R. Dubourget, K. Sasaki, S. Tanabe, H. Hibino, H. Kamata, M. Hashisaka, K. Muraki, T. Fujisawa
  • Journal Title: New J. Phys. Volume: 16 Issue: 6 Pages: 063055-063055
  • DOI: 10.1088/1367-2630/16/6/063055
  • Peer Reviewed
• [Journal Article] Spin-dependent tunneling rates for electrostatically defined GaAs quantum dot (2014)
  • Author(s): Masakazu Yamagishi, Narii Watase, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa
  • Journal Title: Physical Review B Volume: 90 Issue: 3 Pages: 035306-035306
  • DOI: 10.1103/physrevb.90.035306
  • Peer Reviewed
• [Journal Article] Resonant edge magnetoplasmons and their decay in graphene (2014)
  • Author(s): Norio Kumada, Preden Roulleau, Benoit Roche, Masayuki Hashisaka, Hiroki Hibino, Ivana Petković, and Christian Glattli
  • Journal Title: Physical Review Letters Volume: 113 Issue: 26
  • DOI: 10.1103/physrevlett.113.266601
  • Peer Reviewed
• [Presentation] 並走エッジ様態における空間的に分離された電荷・スピン波束の観測 (2016)
  • Author(s): 橋坂 昌幸, 檜山 直晃, 秋保 貴史, 村木 康二, 藤澤 利正
  • 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: 2016-09-13
• [Presentation] Time-domain observation of spin-charge separation in copropagating quantum Hall edge channels (2016)
  • Author(s): M. Hashisaka, N. Hiyama, T. Akiho, K. Muraki, T. Fujisawa
  • Organizer: The 22nd International Conference on High Magnetic Fields in Semiconductor Physics (HMF-22)
  • Place of Presentation: 定山渓ビューホテル (北海道札幌市)
  • Year and Date: 2016-07-24
  • Int'l Joint Research / Invited
• [Presentation] Fractional Quasiparticles in a Local Quantum Hall System (2016)
  • Author(s): M. Hashisaka
  • Organizer: Collaborative Conference on 3D and Material Research (CC3DMR)
  • Place of Presentation: Incheon, Korea
  • Year and Date: 2016-06-20
  • Int'l Joint Research / Invited
• [Presentation] Time-domain observation of spin- and charge-wave packet separation in chiral one-dimensional channels (2016)
  • Author(s): M. Hashisaka, N. Hiyama, T. Akiho, K. Muraki, T. Fujisawa
  • Organizer: Energy Material Nanotechnology (EMN) meeting on Optoelectronics
  • Place of Presentation: Phuket, Thailand
  • Year and Date: 2016-04-12
  • Int'l Joint Research / Invited
• [Presentation] Fractional quasiparticle tunneling through a local quantum Hall system (2016)
  • Author(s): M. Hashisaka
  • Organizer: Energy Material Nanotechnology (EMN) meeting on Quantum
  • Place of Presentation: Phuket, Thailand
  • Year and Date: 2016-04-08
  • Int'l Joint Research / Invited
• [Presentation] Long-lived non-equilibrium states in a quantum-Hall Tomonaga-Luttinger liquid (2016)
  • Author(s): T. Fujisawa, K. Washio, R. Nakazawa, M. Hashisaka, K. Muraki, and Y. Tokura
  • Organizer: American Physical Society (APS) March Meeting
  • Place of Presentation: Baltimore, USA
  • Year and Date: 2016-03-14
  • Int'l Joint Research
• [Presentation] Temperature and Magnetic Field dependence of Fractional Quasiparticle Creation in a Local Quantum Hall System (2015)
  • Author(s): M. Hashisaka, K. Muraki, T. Fujisawa
  • Organizer: International Symposium on Nanoscale Transport and Technology (ISNTT2015)
  • Place of Presentation: Atsugi, Japan
  • Year and Date: 2015-11-17
  • Int'l Joint Research
• [Presentation] Exchange-induced spin blockade in a double quantum dot (2015)
  • Author(s): T. Fujisawa, D. Imanaka, S. Sharmin, M. Hashisaka, and K. Muraki
  • Organizer: International Workshop : Quantum Nanostructures and Electron-Nuclear Spin Interactions
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2015-10-19
  • Int'l Joint Research / Invited
• [Presentation] Cross-correlation noise measurement of a non-equilibrium quantum Hall edge channel (2015)
  • Author(s): T. Ota, M. Hashisaka, K. Muraki, T. Fujisawa
  • Organizer: 5th Summer School on Semiconductor Quantum Coherence Effects and Quantum Information
  • Place of Presentation: Nasu, Japan
  • Year and Date: 2015-09-10
  • Int'l Joint Research
• [Presentation] Edge-Magnetplasmon Mach-Zehnder Interferometer (2015)
  • Author(s): N. Hiyama, M. Hashisaka, and T. Fujisawa
  • Organizer: 5th Summer School on Semiconductor Quantum Coherence Effects and Quantum Information
  • Place of Presentation: Nasu, Japan
  • Year and Date: 2015-09-10
  • Int'l Joint Research
• [Presentation] Phonon-assisted Transport through a Double Quantum Dot in a Surface Acoustic Wave Cavity (2015)
  • Author(s): Y. Sato, J.C.H. Chen, M. Hashisaka, K. Muraki, and T. Fujisawa
  • Organizer: 5th Summer School on Semiconductor Quantum Coherence Effects and Quantum Information
  • Place of Presentation: Nasu, Japan
  • Year and Date: 2015-09-10
  • Int'l Joint Research
• [Presentation] Fractional-Quasiparticle Creation in a Local Fractional Quantum Hall System (2015)
  • Author(s): M. Hashisaka, T. Ota, K. Muraki, T. Fujisawa
  • Organizer: International Symposium on Fluctuation and Structure out of Equilibrium 2015
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2015-08-20
  • Int'l Joint Research
• [Presentation] Detection of Inelastic Processes in a Quantum Hall Edge Channel Using Cross-correlation Noise Measurement (2015)
  • Author(s): T. Ota, M. Hashisaka, K. Muraki, T. Fujisawa
  • Organizer: International Symposium on Fluctuation and Structure out of Equilibrium 2015
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2015-08-20
  • Int'l Joint Research
• [Presentation] Spin-Flip Transport through a Double Quantum Dot in a Surface Acoustic Wave Cavity (2015)
  • Author(s): Y. Sato, J.C.H. Chen, M. Hashisaka, K. Muraki, and T. Fujisawa
  • Organizer: 21st International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS)
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] Nonequilibrium Carriers in Copropagating Quantum Hall Edge Channels (2015)
  • Author(s): R. Nakazawa, K. Morita, M. Hashisaka, K. Muraki, and T. Fujisawa
  • Organizer: 21st International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS)
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] Fractional charge tunneling through a local fractional quantum Hall system measured using cross-correlation noise measurements (2015)
  • Author(s): Masayuki Hashisaka
  • Organizer: New Perspectives in Spintronic and Mesoscopic Physics
  • Place of Presentation: 東京大学物性研究所
  • Year and Date: 2015-06-10 – 2015-06-12
  • Invited
• [Presentation] Fractional charge tunneling through a local fractional quantum Hall system measured using cross-correlation noise measurements (2015)
  • Author(s): M. Hashisaka
  • Organizer: New Perspectives in Spintronic and Mesoscopic Physics (NPMSP)
  • Place of Presentation: Kashiwa, Japan
  • Year and Date: 2015-06-10
  • Int'l Joint Research / Invited
• [Presentation] Creation of Fractional quasiparticles in a tunneling process through a local fractional quantum Hall system (2015)
  • Author(s): Masayuki Hashisaka
  • Organizer: Kwant-workshop
  • Place of Presentation: Grenoble, France
  • Year and Date: 2015-06-01 – 2015-06-05
  • Invited
• [Presentation] Creation of Fractional Quasiparticles in a Tunneling Process through a Local Fractional Quantum Hall System (2015)
  • Author(s): M. Hashisaka
  • Organizer: Kwant workshop
  • Place of Presentation: Grenoble, France
  • Year and Date: 2015-06-01
  • Int'l Joint Research / Invited
• [Presentation] 電流ゆらぎ相互相関測定による量子ホール端における電子の非弾性散乱の検出 (2015)
  • Author(s): 太田智明，橋坂昌幸，村木康二，藤澤利正
  • Organizer: 日本物理学会 第７０回年次大会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] 局所的な分数量子ホール領域における分数電荷準粒子の生成 (2014)
  • Author(s): 橋坂昌幸，太田智明，村木康二，藤澤利正
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-10-07 – 2014-10-11
• [Presentation] 量子ホール端における再分配されたショット雑音の相互相関測定 (2014)
  • Author(s): 太田智明，橋坂昌幸，村木康二，藤澤利正
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-10-07 – 2014-10-11
• [Presentation] Fractional Charge Tunneling through a Local Fractional Quantum Hall Region (2014)
  • Author(s): Masayuki Hashisaka, Tomoaki Ota, Koji Muraki, Toshimasa Fujisawa
  • Organizer: 32nd International Conference on Physics of Semiconductor
  • Place of Presentation: Austin, Texas, USA
  • Year and Date: 2014-08-10 – 2014-08-15
• [Presentation] Cross Correlation Measurement of Repartitioned Noise in a Quantum Hall Edge Channel (2014)
  • Author(s): Tomoaki Ota, Masayuki Hashisaka, Koji Muraki, Toshimasa Fujisawa
  • Organizer: 32nd International Conference on Physics of Semiconductor
  • Place of Presentation: Austin, Texas, USA
  • Year and Date: 2014-08-10 – 2014-08-15
• [Remarks] 東京工業大学 大学院理工学研究科 理学系 物性物理学専攻 藤澤研究室 橋坂 昌幸
  • URL: http://fujisawa.phys.titech.ac.jp/index.html
• [Remarks] 東京工業大学 大学院理工学研究科 理学系 物性物理学専攻 藤澤研究室 橋坂 昌幸
  • URL: http://fujisawa.phys.titech.ac.jp/~hashisaka/