Coherent control of nuclear spin using spin injection into semiconductor for application to quntum information devices
Project/Area Number |
25286039
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Applied materials
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Research Institution | Hokkaido University |
Principal Investigator |
UEMURA TETSUYA 北海道大学, 情報科学研究科, 准教授 (20344476)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
|
Keywords | 半導体スピン注入 / 核スピン / ハーフメタル / 半導体 / 量子ビット / 量子ゲート |
Outline of Final Research Achievements |
Nuclear spins in semiconductors are an ideal system for implementing quantum bits (qubits) for quantum computation because they have an extremely long coherence time. In this project, a novel nuclear magnetic resonance (NMR) system that uses spin injection from a highly polarized spin source has been developed. An efficient spin injection into GaAs from a half-metallic spin source of Co2MnSi enabled an efficient dynamic nuclear polarization of Ga and As nuclei in GaAs and a sensitive detection of NMR signals. Moreover, coherent control of nuclear spins, or the Rabi oscillation between two quantum levels formed at Ga nuclei, induced by a pulsed NMR has been demonstrated at a relatively low magnetic field of approximately 0.1 T. This provides a novel all-electrical solid-state NMR system with the high spatial resolution and high sensitivity needed to implement scalable nuclear-spin based qubits.
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Report
(4 results)
Research Products
(87 results)
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[Journal Article] Spin-resolved low-energy and hard X-ray photoelectron spectroscopy of off-stoichiometric Co2MnSi Heusler thin films exhibiting a record TMR2015
Author(s)
R. Fetzer, S. Ouardi, Y. Honda, H.-x. Liu, S. Chadov, B. Balke, S. Ueda, M. Suzuki, T. Uemura, M. Yamamoto, M. Aeschlimann, M. Cinchetti, G. H. Fecher, and C. Felser,
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Journal Title
J. Phys. D: Appl. Phys.
Volume: 48
Issue: 16
Pages: 164002-164002
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Probing the electronic and spintronic properties of buried interfaces by extremely low energy photoemission spectroscopy2015
Author(s)
R. Fetzer, B. Stadtmuller, Y. Ohdaira, H. Naganuma, M. Oogane, Y. Ando, T. Taira, T. Uemura, M. Yamamoto, M. Aeschlimann, and M. Cinchetti
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Journal Title
Scientific Reports
Volume: 5
Issue: 1
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Effect of nonstoichiometry on the half-metallic character of Co2MnSi investigated through saturation magnetization and tunneling magnetoresistance ratio2014
Author(s)
G.-f. Li, Y. Honda, H.-x. Liu, K.-i. Matsuda, M. Arita, T. Uemura, M. Yamamoto, Y. Miura, M. Shirai, T. Saito, F. Shi and P. M. Voyles
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Journal Title
Phys. Rev. B
Volume: 89
Issue: 1
Pages: 14428-14428
DOI
Related Report
Peer Reviewed
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[Journal Article] Probing the electronic states of high-TMR off-stoichiometric Co2MnSi thin films by hard x-ray photoelectron spectroscopy2014
Author(s)
X. Kozina, J. Karel, S. Ouardi, S. Chadov, G. H. Fecher, C. Felser, G. Stryganyuk, B. Balke, T. Ishikawa, T. Uemura, M. Yamamoto, E. Ikenaga, S. Ueda and K. Kobayashi
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Journal Title
Phys. Rev. B
Volume: 89
Issue: 12
DOI
Related Report
Peer Reviewed
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[Presentation] Giant tunnel magnetoresistance in fully epitaxial Co2(Mn,Fe)Si/MgO/Co2(Mn,Fe)Si magnetic tunnel junctions2013
Author(s)
T. Kawami, H. Liu, Y. Honda, K. M. Ayele, T. Uemura, F. Shi, P. M. Voyles and M. Yamamoto
Organizer
58th Annual Conference on Magnetism and Magnetic Materials
Place of Presentation
Sheraton Denver Downtown Hotel, Denver, Colorado, USA
Related Report
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[Presentation] Spin and symmetry properties of the buried Co2MnSi/MgO interface2013
Author(s)
R. Fetzer, Y. Ohdaira, H. Naganuma, M. Oogane, Y. Ando, T. Taira, T. Uemura, M. Yamamoto, M. Aeschlimann and M. Cinchetti
Organizer
58th Annual Conference on Magnetism and Magnetic Materials
Place of Presentation
Sheraton Denver Downtown Hotel, Denver, Colorado, USA
Related Report
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