Quantum transport by coupling between local structure and macroscopic phase
Project/Area Number |
15K05192
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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 II
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Research Institution | Japan Atomic Energy Agency |
Principal Investigator |
Mori Michiyasu 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 研究主幹 (30396519)
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Co-Investigator(Kenkyū-buntansha) |
小椎八重 航 国立研究開発法人理化学研究所, 創発物性科学研究センター, 上級研究員 (20273253)
|
Project Period (FY) |
2015-04-01 – 2019-03-31
|
Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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Keywords | スピンホール効果 / 熱ホール効果 / 電子相関 / 高温超伝導 / 磁気励起 / フォノンホール効果 / スピン液体 / スピン波 / スピントロニクス / 強磁性共鳴 / 薄膜 / 磁気ゆらぎ / 反強磁性体 |
Outline of Final Research Achievements |
Magnetization is a macroscopic physical quantity, and its spatiotemporal change in phase is a collective excitation called a spin wave. By driving the spin wave with an alternating magnetic field or a temperature gradient, a spin current, which is a magnetic flow, is generated. In this study, we focused on the electron correlation effect on spin current generation and spin current conversion. It is found that the coherence of spin wave excitation is lost due to electron correlation. By the spin Hall effect, mutual conversion between spin and charge current is induced. We find that the electron correlation change its sign in Ir doped Cu. We also show that the thermal Hall effect can occur due to the local structural change of the spin cluster accompanied by the electron correlation.
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Academic Significance and Societal Importance of the Research Achievements |
現在、世界がしのぎを削る研究の的となっているのが,スピン流の物理である。スピントロニクスの研究は応用面だけでなく、基礎物理学にも豊かな色彩を放ち始めている。初期の磁気抵抗効果を中心とした研究から、現在は電流やスピン流を使う試みは新たな段階に入っている。スピン流を基軸にした熱電発電の原理(スピンゼーベック効果)はその典型である。スピンゼーベック効果では、スピン流の生成・注入・変換により起こる。本研究成果は、スピン流に対する電子相関の効果を示したものであり、新たな段階に入ったスピントロニクス研究へ貢献するものと位置付けられる。
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Report
(5 results)
Research Products
(54 results)
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[Journal Article] Magnetic structure and dispersion relation of the S=1/2 quasi-one-dimensional Ising-like antiferromagnet BaCo2V2O8 in a transverse magnetic field2017
Author(s)
M. Matsuda, H. Onishi, A. Okutani, J. Ma, H. Agrawal, T. Hong, D. M. Pajerowski, J. R. D. Copley, K. Okunishi, M. Mori, S. Kimura, and M. Hagiwar
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Journal Title
Phys. Rev. B
Volume: 96
Issue: 2
Pages: 024439-024439
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Magnetization dynamics and its scattering mechanism in thin CoFeB films with interfacial anisotropy2017
Author(s)
A. Okada, S. He, Bo Gu, S. Kanai, A. Soumyanarayanan, S. T. Lim, M. Tran, M. Mori, S. Maekawa, F. Matsukura, H. Ohno, C. Panagopoulos
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Journal Title
Proceedings of Naional Academy of Science of the United of States of America
Volume: 114
Issue: 15
Pages: 3815-3820
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Magnon density of states in yttrium iron garnet2017
Author(s)
S. Shamoto, M. Akatsu, T. U. Ito, R. Kajimoto, M. Mori, H. Onishi, M. Nakamura, S. Kawamura, K. Shibata, Y. Nemoto, and S. Maekawa
Organizer
International Conference on Neutron Scattering
Related Report
Int'l Joint Research
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[Presentation] Y3Fe5O12のマグノン状態密度と分散2017
Author(s)
社本真一,伊藤孝,大西弘明,森道康,松浦直人,赤津光洋,中村充孝,稲村泰弘,樹神克明,河村聖子,根本祐一,柴田薫,前川禎通
Organizer
日本中性子科学会第17回年会
Related Report
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