Fundamental studies for fabrication of intrinsic Josephson junctions using single crystals of layered BiS2-based superconductor
| Project/Area Number |
26600077
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied materials
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 層状超伝導体 / BiS2系超伝導体 / 単結晶育成 / ジョセフソン素子 / アニール効果 / 基礎物性 / 元素置換効果 / 新超伝導体 / 接合作製 / 新物質合成 / ＢｉＳ２系超伝導体 / 超伝導異方性 / 固有ジョセフソン素子 / 結晶構造 |
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| Outline of Final Research Achievements |
We succeeded in growth of RE(O,F)BiS2 single crystals with high superconductivity anisotropy, which is suitable for fabricating Josephson junctions. We examined the annealing effects on superconductivity properties at high temperatures, in order to clarify the availability of the cross-junction method in this system. Since superconductivity survived when annealed at T < 400 degree C, we tried to fabricate cross junctions of Nd(O,F)BiS2 crystals by annealing at 400 degree C. However, superconducting pass has not been created using this process so far.
To explore another method for fabrication of RE(O,F)BiS2 Josephson junctions, we examined the element substitution effects on superconductivity of RE(O,F)BiS2. The non-superconducting phases were created by Sb- or RE-substitutions, which will be useful for fabricating superconducting/non-superconducting/superconducting junctions with this system. In addition, we discovered new superconductor, Sn1-xAgxTe during this project.
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Report
(3 results)
Research Products
(45 results)
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[Journal Article] In-plane chemical pressure essential for superconductivity in BiCh2-based (Ch: S, Se) layered structure2015
Author(s)
Yoshikazu Mizuguchi, Akira Miura, Joe Kajitani, Takafumi Hiroi, Osuke Miura, Kiyoharu Tadanaga, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa
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Journal Title
Scientific Reports
Volume: 2015
Issue: 1
Pages: 14968-14968
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Structural Difference in Superconductive and Nonsuperconductive Bi-S Planes within Bi4O4Bi2S4 Blocks2015
Author(s)
Akira Miura, Yoshikazu Mizuguchi, Tsuyoshi Sugawara, Yongming Wang, Takahiro Takei, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa, Osuke Miura, Kiyoharu Tadanaga
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Journal Title
Inorganic Chemistry
Volume: 54
Issue: 21
Pages: 10462-10467
DOI
NAID
Related Report
Peer Reviewed
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