| Project/Area Number |
23540422
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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 |
Condensed matter physics II
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
KAWAMATA Shuichi 大阪府立大学, 工学(系)研究科(研究院), 准教授 (50211868)
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| Co-Investigator(Renkei-kenkyūsha) |
KATO Masaru 大阪府立大学, 大学院工学研究科, 准教授 (90204495)
ISHIDA Takekazu 大阪府立大学, 大学院工学研究科, 教授 (00159732)
KAWAMURA Yuichi 大阪府立大学, 大学院工学研究科, 教授 (80275289)
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 超伝導ナノ構造 / 超伝導接合 / 超伝導論理デバイス / 超伝導磁束量子 / 銅酸化物超伝導体 |
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| Outline of Final Research Achievements |
The d-dot is a composite structure where a d-wave superconductor is embedded in an s-wave superconductor. In this research, we used a high temperature cuprate superconductor BSCCO single crystal as the d-wave superconductor and Pb as the s-wave superconductor. The d-dot was fabricated by using photolithography technique and ion-milling method and so on. Magnetic flux distribution was measured by using a scanning SQUID magnetometer. The spontaneous half flux quantum due to the interference between the d- and s-wave superconductors has been observed at the corners of the d-dot. This observation crucially proves that the superconducting order parameter of the BSCCO has the d-wave symmetry.
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