Control of single electron charge-spin-phonon dynamics in the terahertz frequency range
| Project/Area Number |
17H02732
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanostructural physics
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| Research Institution | Tohoku Institute of Technology |
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Principal Investigator |
Shibata Kenji 東北工業大学, 工学部, 准教授 (00436578)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Keywords | 量子ドット / トランジスタ / テラヘルツ / スピン軌道相互作用 / 量子井戸 / 量子ポイントコンタクト / 電気伝導 / テラヘルツ電磁波 / トンネル効果 |
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| Outline of Final Research Achievements |
Electrical manipulation and read-out of quantum states in zero-dimensional quantum dots (QDs) by nanogap metal electrodes is expected to bring about innovation in quantum information processing. In this study, we fabricated single QD transistors for the manipulation of single spin states in the terahertz frequency range. Narrow gap III-V compound semiconductors, such as InAs, InSb, and GaSb are used as the QD material in order to utilize the strong spin-orbit interaction in them. We also demonstrated the electrical modulation of conductance in the metal quantum point contacts for the electrical readout of the quantum states in the fabricated QD transistors. These works are opening a way for novel quantum information applications on QD systems.
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| Academic Significance and Societal Importance of the Research Achievements |
単一の自己組織化量子ドットを用いた量子情報処理デバイスにおいて、１つの電子やスピン、光子に情報機能を持たせるための研究をおこなった。特に、テラヘルツ光による単一スピンの高速回転を実現するために、強いスピン軌道相互作用を有するInAsやInSb、GaSbなどの半導体を用いた単一量子ドットトランジスタの作製に関する研究を行うと同時に、その量子状態の検出のために用いる高感度電荷検出器の実現に関する研究を行った。
本研究の成果は、テラヘルツ光による高速な単一電荷・スピン・フォノンの制御とそれによる情報機能の創製を行う試みであり、未開拓の周波数帯であるテラヘルツ帯での量子情報処理への貢献が期待できる。
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Report
(5 results)
Research Products
(31 results)
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[Journal Article] Magnetotransport of electrically induced two-dimensional hole gases in undoped GaSb quantum wells2020
Author(s)
Kenji Shibata, Matija Karalic, Christopher Mittag, Thomas Tschirky, Christian Reichl, Hiromu Ito, Katsushi Hashimoto, Toru Tomimatsu, Yoshiro Hirayama, Werner Wegscheider, Thomas Ihn, and Klaus Ensslin
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Journal Title
Physical Review Research
Volume: 2
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells2019
Author(s)
K. Shibata, M. Karalic, C. Mittag, T. Tschirky, C. Reichl, H. Ito, K. Hashimoto, T. Tomimatsu, Y. Hirayama, W. Wegscheider, T. Ihn, K. Ensslin
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Journal Title
Applied Physics Letters
Volume: 114
Pages: 232102-232102
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells2020
Author(s)
K. Shibata, M. Karalic, C. Mittag, T. Tschirky, C. Reichl, H. Ito, K. Hashimoto, T. Tomimatsu, Y. Hirayama, W. Wegscheider, T. Ihn, and K. Ensslin
Organizer
The 4th International Symposium for The Core Research Cluster for Spintronics
Related Report
Int'l Joint Research
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[Presentation] Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells2019
Author(s)
K. Shibata, M. Karalic, C. Mittag, T. Tschirky, C. Reichl, H. Ito, K. Hashimoto, T. Tomimatsu, Y. Hirayama, W. Wegscheider, T. Ihn, and K. Ensslin
Organizer
The 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (Edison 21)
Related Report
Int'l Joint Research
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[Presentation] ノンドープGaSb量子井戸における2次元ホール系の磁場中輸送特性2019
Author(s)
柴田憲治, M. Karalic, C. Mittag, M. Hug, T. Tschirky, C. Reichl, 伊藤煕, 橋本克之, 冨松透, 平山祥郎, W. Wegscheider, T. Ihn, and K. Ensslin
Organizer
第80回応用物理学会秋季学術講演会
Related Report
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[Presentation] Two-dimensional hole transport in undoped GaSb quantum well2019
Author(s)
K. Shibata, M. Karalic, C. Mittag, T. Tschirky, C. Reichl, H. Ito, K. Hashimoto, T. Tomimatsu, Y. Hirayama, W. Wegscheider, T. Ihn, and K. Ensslin
Organizer
International Symposium on Hybrid Quantum Systems 2019 (HQS 2019)
Related Report
Int'l Joint Research
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[Presentation] GaSb量子井戸における二次元ホール系の磁場中輸送特性2019
Author(s)
柴田憲治, M. Karalic, C. Mittag, 伊藤煕, Z. Lei, T. Tschirky, C. Reichl, 橋本克之, 冨松透, 平山祥郎, W. Wegscheider, T. Ihn, K. Ensslin
Organizer
日本物理学会 第７４回年次大会
Related Report
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