2015 Fiscal Year Final Research Report
Scanning tunneling microscopy on proximity effects at superconductor/ferromagnetic interfaces
| Project/Area Number |
25286055
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
YOSHIDA Yasuo 東京大学, 物性研究所, 助教 (10589790)
HAMADA Masayuki 東京大学, 物性研究所, 技術専門職員 (00396920)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 走査トンネル顕微鏡 / 近接効果 / ２次元超伝導 / 強磁性薄膜 / ラシュバ効果 |
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| Outline of Final Research Achievements |
When a normal metal is made contact with a superconductor, superconducting properties penetrate into the normal metal from the interface. Utilizing a function of local tunneling spectroscopy, we investigated the induced superconductivity by scanning tunneling microscopy, and revealed that local defective structures and electronic states affect the propagation of the proximate effect.
In studies of the proximity effect into two-dimensional normal metal layers, we found that the monoatomic steps in metal layers exhibit significant effects on the propagation of superconductivity. We revealed that the steps disrupt the propagation beyond them and enhance the superconductivity between the steps and the super/normal interface.
At an interface between a ferromagnetic metal and a superconductor, we observed breaking of superconductivity near the interface in the superconducting material, and found that the breaking is anisotropic reflecting the shape of the Fermi surface.
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| Free Research Field |
理工系
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