Physics of Odd-frequency pairings Theory and Experiment
| Project/Area Number |
15H03686
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Nagoya University |
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Principal Investigator |
Tanaka Yukio 名古屋大学, 工学研究科, 教授 (40212039)
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| Co-Investigator(Kenkyū-buntansha) |
柏谷 聡 国立研究開発法人産業技術総合研究所, その他部局等, 首席研究員 (40356770)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2015: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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| Keywords | 超伝導対称性 / 超伝導近接効果 / マヨラナフェルミオン / 2重量子ドット / スピン3重項超伝導体 / 近接効果 / トンネル効果 / 超伝導 / 対称性 / 新奇なクーパー対 / 接合系 / Eilenberger 方程式 / アンドレーエフ束縛状態 / 奇周波数ペア / 不純物散乱 |
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| Outline of Final Research Achievements |
Odd-frequency pairing is an exotic pairing which has a sign change of the exchange of time of electrons forming Cooper pair. From the theoretical side, we have studied
(1)Influence of the impurity scattering in unconventional superconductor / normal metal junctions on the charge transport profile including charge conductance and shot noise (2)Non-local conductance in the superconductor double quantum dot hybrid system (3)Double semiconductor nano-wires on the superconductor from the view point of odd-frequency pairings. Also, we have studied two channel Kondo lattice where bulk odd-frequency gap function is realized. We have calculated tunneling conductance and Josephson current in this model. Experimentally, we have measured a surface impedance of Au/ Sr2RuO4 junctions. We have found anomalous temperature dependence as compared to conventional superconductor Al. We have also developed a suspended normal metal type tunneling junction refrigerator.
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Report
(4 results)
Research Products
(23 results)
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[Presentation] Physics of Andreev Bound states2016
Author(s)
Y. Tanaka
Organizer
The ESAS Winter School, ‘Novel frontiers in superconducting electronics: from fundamental concepts and advanced materials towards future applications
Place of Presentation
イタリア、ポッツオーリ
Year and Date
2016-12-12
Related Report
Int'l Joint Research / Invited
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