| Project/Area Number |
24510181
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Microdevices/Nanodevices
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
HATANO Takeshi 独立行政法人物質・材料研究機構, 超伝導物性ユニット, グループリーダー (50354337)
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| Co-Investigator(Kenkyū-buntansha) |
WANG Huabing 独立行政法人物質・材料研究機構, 超伝導物性ユニット, 主幹研究員 (70421427)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 固有ジョセフソン接合 / 空洞共振 / テラヘルツ / 交流ジョセフソン効果 / ビスマス系高温超伝導体 / テラヘルツ発振 / ジョセフソン磁束フロー / 固有ジョセフソン効果 / ジョセフソン磁束格子フロー |
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| Outline of Final Research Achievements |
High-Tc superconducting oxides have layered Perovskite crystal structures. Among these, in highly anisotropic Bi2Sr2CaCu2O8+, “superconducting” CuO2 double layers are interleaved with “insulating” SrO-BiO-BiO-SrO layers. Such an alternating layered structure was found to exhibit a “Josephson effect”. Namely, a device structure is naturally embedded in the crystals. The number of Josephson junctions in a crystal having a thickness of 1 μm is as much as 650, which can never be realized by a thin film fabrication technique.
Furthermore, the energy gap of a high-Tc superconductor is one order larger than that of a conventional metal superconductor (Nb), which results in the generation of a one order higher frequency microwave becoming possible, i. e. from 1 THz to 10 THz from the enormous number of junctions in the array. Thus, one can expect a powerful THz generation from a Bi2Sr2CaCu2O8+d single crystal.
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