Radiation-induced metastable electronic phase in strongly correlated systems
| Project/Area Number |
15H04238
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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 |
Nuclear engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
Asai Keisuke 東北大学, 工学研究科, 教授 (60231859)
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| Co-Investigator(Kenkyū-buntansha) |
越水 正典 東北大学, 工学研究科, 准教授 (40374962)
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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 |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
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| Keywords | 超伝導 / 放射線 / ドーピング / Ｘ線 / 超伝導体 / YBCO / 放射線照射効果 / 準安定的 / 強相関電子系 / 放射線照射 / 電子励起 / キャリアドープ / 磁性 |
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| Outline of Final Research Achievements |
We investigated the irradiation effects on the conductive and magnetic properties of high-temperature cuprate superconductors with different compositions upon irradiation of ionizing radiations. We observed a rise in the superconductive transition temperature after X-ray irradiation, and this result was consistent with the change in the magnetic properties induced by the irradiation. These results are owing to the hole doping by the irradiation, which generates electron-hole pairs and subsequently electrons are trapped at defect sites such as oxygen vacancies. We successfully demonstrated that the enhancement in the supercnductive properties can be achieved by irradiation of X-ray or gamma-ray, which have high permeability in bulk materials.
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Report
(4 results)
Research Products
(13 results)
