Novel Properties of the Time-Reversal-Symmetry-Broken State in Multi-Component Superconductors
| Project/Area Number |
25400385
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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 | National Institute for Materials Science |
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Principal Investigator |
Hu Xiao 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究者 (90238428)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | multiband superconductor / time-reversal symmetry / flux quantum / fractional flux / time reversal symmetry / Josephson junction / SQUID / vortex cluster / unequal critical current |
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| Outline of Final Research Achievements |
Iron-based superconductors are known to have multi components. Nontrivial phase differences among components appear in a three-component superconductor when the inter-component interactions are repulsive, and a time-reversal-symmetry-broken state is stablized even without external magnetic field. We have revealed that, (1) the critical current is direction dependent in a Josephson junction between the TRSB superconductor and a single-component one; (2) steps with un-quantized flux appear in the magnetization curve (B-H curve) of a TRSB superconductor, and steps appear always in pair with the sum of fluxes equal to the flux quantization.
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Report
(4 results)
Research Products
(18 results)
