Excitation and relaxation dynamics of correlated electron systems
Project/Area Number |
24360036
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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 physics, general
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Research Institution | Institute of Physical and Chemical Research |
Principal Investigator |
Koshibae Wataru 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)
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Co-Investigator(Kenkyū-buntansha) |
MORI MICHIYASU 国立研究開発法人日本原子力研究開発機構, 先端基礎研究センター, 研究副主幹 (30396519)
TSUTSUI KENJI 国立研究開発法人放射線医学総合研究所, 関西光科学研究所放射光科学研究センター, 上席研究員 (80291011)
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Project Period (FY) |
2012-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
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Keywords | 光電変換 / skyrmion / 光誘起絶縁体金属転移 / 実時間ダイナミクス / 磁気skyrmion / 絶縁体金属転移 / Skyrmion / ジョセフソン効果 / 非共鳴・非弾性X線散乱 / 遷移金属化合物 |
Outline of Final Research Achievements |
In this project, we theoretically study the real-time dynamics of excitation and relaxation of the electronic states in strongly correlated electron systems. The electron-electron interaction is expressed by the mutual precession of the coupled quantum-electron spin and local classically-ordered spin. We develop a numerical method to examine the time evolution of the electronic structure and find the multiple carrier generation by electron-electron interaction. Based on our theory, we design a hetero-structured device and successfully show the magnetically controlled photovoltaic effect experimentally. We also study the real-time dynamics of the topological magnetic texture in chiral and dipolar magnets and theoretically develop the design principles of skyrmionic memory devices.
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Report
(5 results)
Research Products
(85 results)
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[Journal Article] Memory functions of magnetic skyrmions2015
Author(s)
Wataru Koshibae, Yoshio Kaneko, Junichi Iwasaki Masashi Kawasaki, Yoshinori Tokura, and Naoto Nagaosa
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Journal Title
Japanese Journal of Applied Physics
Volume: 54
Issue: 5
Pages: 053001-053001
DOI
NAID
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Electronic excitations around the substituted atom in La_2Cu_<1-y> Ni_yO_4 as seen via resonant inelastic x-ray scattering2012
Author(s)
K. Ishii, K. Tsutsui, K. Ikeuchi, I. Jarrige, J. Mizuki, H. Hiraka, K. Yamada, T. Tohyama, S. Maekawa, Y. Endo, H. Ishii, and Y. Q. Cai
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Journal Title
Physical Review B
Volume: 85
Issue: 10
Pages: 104509-104509
DOI
Related Report
Peer Reviewed
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[Presentation] A theoretical design of skyrmion device2014
Author(s)
W. Koshibae
Organizer
IMR International Workshop “Research frontier of transition-metal compounds opened by advanced spectroscopies”
Place of Presentation
Institute for Materials Research, Tohoku University, Japan
Year and Date
2014-10-02
Related Report
Invited
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[Presentation] Thermally Driven Ratchet Motion of Skyrmion Microcrystal and Topological Magnon Hall Effect
Author(s)
M. Mochizuki, X. Z. Yu, S. Seki, N. Kanazawa, W. Koshibae, J. Zang, M. Mostovoy, Y. Tokura, and N. Nagaosa
Organizer
APS March Meeting 2014
Place of Presentation
Denver, Colorado, 米国
Related Report
Invited
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