2015 Fiscal Year Final Research Report
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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| 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 |
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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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| Free Research Field |
固体物理学
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