2016 Fiscal Year Final Research Report
Investigation of chiral superconductivity in uranium-based compounds
| Project/Area Number |
15K13514
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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 |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
SHIMOZAWA MASAAKI 東京大学, 物性研究所, 助教 (40736162)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 時間反転対称性 / カイラリティ / ドメイン / 強相関超伝導 / 重い電子系 / 磁場侵入長 / 走査型プローブ顕微鏡 / 超伝導ギャップ |
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| Outline of Final Research Achievements |
We propose two experiments detecting chiral superconducting state with broken time reversal symmetry which has been discussed in strongly correlated systems. One is high-resolution measurements of magnetic field distribution by using scanning magnetic probe microscopy, and the other is high-precision anisotropic measurements of penetration depth down to very low temperatures. We have been developing the former microscopy with a miniature Hall probe as well as superconducting quantum interference device, and have succeeded in testing it for a chiral magnet. For the latter, low-temperature measurements down to 30 mK became available, and for a uranium compound we have obtained temperature dependence expected for the chiral superconducting state. In addition, we obtained unexpected results of the emergence of chiral superconductivity in the vicinity of twin boundaries in the iron-based superconductor FeSe.
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| Free Research Field |
物性物理学
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