Theoretical study on nonequilibrium property of vortices hosted a Majorana fermion
| Project/Area Number |
15K17715
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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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 | Institute of Physical and Chemical Research (2018-2019)
The University of Tokyo (2015-2017) |
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Principal Investigator |
Tsutsumi Yasumasa 国立研究開発法人理化学研究所, 創発物性科学研究センター, 研究員 (10631781)
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| Project Period (FY) |
2015-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 不純物効果 / 交流応答 / トポロジカル超伝導 / Keldyshグリーン関数 / 磁束渦糸 / カイラル超伝導 / トポロジカル超伝導体 / 磁束フロー抵抗 / 物性理論 |
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| Outline of Final Research Achievements |
Impurity effect for Majorana fermions hosted by vortices in topological superconductors has been clarified. The flux-flow resistivity is influenced by the impurity effect given by the coherence factor of the Majorana fermions. Non-equilibrium properties of the Majorana fermions under ac electric field has also been clarified by using a developed program to calculate Green's functions in the Keldysh formalism.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果により、マヨラナフェルミオンの干渉に関する性質を決めるコヒーレンス因子が動的性質に重要な寄与をすることが明らかになった。干渉効果は量子力学的な性質であり、マヨラナフェルミオンでは生成と消滅の演算子が等しいという際立った特徴を直接観測する道を拓く。コヒーレンス因子は、中性子非弾性散乱や準粒子干渉を利用すれば観測できると期待される。
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Report
(6 results)
Research Products
(37 results)
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[Journal Article] Searching for gap zeros in Sr2RuO4 via field-angle-dependent specific-heat measurement2018
Author(s)
Shunichiro Kittaka, Shota Nakamura, Toshiro Sakakibara, Naoki Kikugawa, Taichi Terashima, Shinya Uji, Dmitry A. Sokolov, Andrew P. Mackenzie, Koki Irie, Yasumasa Tsutsumi, Katsuhiro Suzuki, and Kazushige Machida
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Journal Title
J. Phys. Soc. Jpn.
Volume: 87
Issue: 9
Pages: 0937031-5
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Book] スピントロニクス2019
Author(s)
前川禎通、堤康雅
Total Pages
160
Publisher
日本評論社
ISBN
9784535788251
Related Report
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