Development of precise control and observation of vortex motion and their application to non-equilibrium science
Project/Area Number |
15K13516
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics II
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
Okuma Satoshi 東京工業大学, 理学院, 教授 (50194105)
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Co-Investigator(Renkei-kenkyūsha) |
KANEKO Shin-ichi 東京工業大学, 理学院, 助教 (40301171)
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
Keywords | 超伝導渦糸 / 非平衡ダイナミクス / 動的相転移 / プラスチックフロー / 動的融解 / 異方的格子 / 自己組織化 / せん断力 / 渦糸 / ピニング / 動的秩序化 |
Outline of Final Research Achievements |
By preparing anisotropic vortex lattices, which cannot be realized in ordinary solids, under an applied field tilted from the normal to the plane of a superconducting film, we study a dynamic-melting phenomenon of the fast driven lattices associated with an increase in the vortex density, using a mode-locking technique. The results show that a melting condition of the anisotropic lattices is determined only by the shorter side of the distorted lattices regardless of the shape of the lattices. In contrast, vortex assemblies with disordered initial configuration become gradually ordered under the application of ac drive. By developing two-step measurements of transient voltage responses, we find that the vortex configuration during the dynamic ordering is separated into disordered and ordered regions and that the ratio of the disordered region increases with the number of cycles.
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Report
(4 results)
Research Products
(80 results)
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[Presentation] 異方的条件下におけるランダム組織化2017
Author(s)
家永 紘一郎, 白幡 祐大, 河村 泰樹, ドブローカ・ミハイ, 金子 真一, 大熊 哲
Organizer
極低温研究支援センター研究発表会
Place of Presentation
東京工業大学
Year and Date
2017-01-24
Related Report
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[Presentation] Dynamic Melting of Anisotropic Vortex Lattices2016
Author(s)
T. Inoue, A. Ochi, Y. Kawamura, M. Dobroka, K. Ienaga, S. Kaneko, N. Kokubo, S. Okuma
Organizer
29th International Symposium on Superconductivity (ISS'16)
Place of Presentation
Tokyo International Forum, Tokyo
Year and Date
2016-12-12
Related Report
Int'l Joint Research
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[Presentation] 渦糸格子の動的融解2016
Author(s)
大熊 哲, 越智亜玖利, 井上俊規, 金子真一, 家永紘一郎, 小久保伸人
Organizer
第24回渦糸物理国内会議
Place of Presentation
あきた芸術村温泉ゆぽぽ
Year and Date
2016-11-28
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[Presentation] 異方的渦糸格子の動的融解Ⅲ2016
Author(s)
井上俊規, 越智亜玖利, 河村泰樹, 家永紘一郎, 金子真一, 小久保伸人, 大熊哲
Organizer
日本物理学会2016年秋季大会
Place of Presentation
金沢大学
Year and Date
2016-09-13
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[Presentation] 直流駆動系から見た可逆不可逆転移2015
Author(s)
井上俊規, 河村泰樹, 新田亮馬, 金子真一, 大熊哲
Organizer
日本物理学会2015年秋季大会
Place of Presentation
関西大学(吹田市千里山キャンパス)
Year and Date
2015-09-16
Related Report
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