Detection and control of Majorana zero modes in topological insulator / superconductor heterojunctions
Project/Area Number |
19K23415
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Multi-year Fund |
Review Section |
0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
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Research Institution | National Institute of Advanced Industrial Science and Technology (2020-2021) Tohoku University (2019) |
Principal Investigator |
Inoue Hisashi 国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究員 (90843342)
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Project Period (FY) |
2019-08-30 – 2022-03-31
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Project Status |
Completed (Fiscal Year 2021)
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Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | トポロジカル絶縁体 / ジョセフソン接合 / 超伝導 / マヨラナ粒子 |
Outline of Research at the Start |
人工知能の発展やビッグデータの有効活用に向けて、量子力学に基づく高速な情報処理を可能にする量子計算技術が注目されている。トポロジカル絶縁体と超伝導体との接合に形成されるマヨラナ粒子は、揺動に強い量子計算実現の可能性を秘めている。本研究では、トポロジカル絶縁体と超伝導体との接合をトンネル分光測定することで、マヨラナ粒子の観測を確たるものにしつつ、制御手法の提唱に繋げる。未熟な研究状況を打破して世界に道筋を拓き、マヨラナ粒子を用いた量子計算プラットフォームの確立に大きく貢献する成果となる。
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Outline of Final Research Achievements |
Some material systems are believed to host Majorana zero modes - quantum charge-neutral states with their properties unexplored. Here we develop a Josephson junction with high-quality topological insulator thin films, aiming to observe the signature of Majorana zero modes and control their mysterious quantum states. We succeeded in precisely fabricating sub-micron-sized junctions and performing highly accurate measurements of these devices.
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Academic Significance and Societal Importance of the Research Achievements |
高品質なトポロジカル絶縁体薄膜と、トポロジカルジョセフソン素子等、微細素子の作製・評価技術の構築に関する実験を実施した。以上の成果により、物質中のマヨラナ粒子の観測と制御に向けた研究が前進するものと期待する。
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Report
(4 results)
Research Products
(12 results)
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[Journal Article] Evidence of two-dimensional flat band at the surface of antiferromagnetic kagome metal FeSn2021
Author(s)
Minyong Han, Hisashi Inoue, Shiang Fang, Caolan John, Linda Ye, Mun K. Chan, David Graf, Takehito Suzuki, Madhav Prasad Ghimire, Won Joon Cho, Efthimios Kaxiras, Joseph G. Checkelsky
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Journal Title
Nature Communications
Volume: 12
Issue: 1
Pages: 5345-5345
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Tunneling spectroscopy of thin film antiferromagnetic kagome metal2022
Author(s)
井上 悠, Minyong Han, Shiang Fang, Caolan John, Linda Ye, Mun K. Chan, David Graf, 鈴木健士, Madhav Prasad Ghimire, Won Joon Cho, Efthimios Kaxiras, Joseph G. Checkelsky
Organizer
令和3年度 新学術領域研究「量子液晶の物性科学」領域研究会
Related Report
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[Presentation] カゴメ金属ヘテロ構造に形成される二次元フラットバンドの観測2022
Author(s)
井上 悠, Minyong Han, Shiang Fang, Caolan John, Linda Ye, Mun K. Chan, David E. Graf, 鈴木健士, Madhav Prasad Ghimire, Won Joon Cho, Efthimios Kaxiras, Joseph G. Checkelsky
Organizer
日本物理学会第77回年次大会
Related Report
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[Presentation] Planar Schottky tunneling spectroscopy of antiferromagnetic kagome metal FeSn2021
Author(s)
Minyong Han, Hisashi Inoue, Shiang Fang, Caolan John, Linda Ye, Mun K. Chan, David E Graf, Takehito Suzuki, Madhav Prasad Ghimire, Won Joon Cho, Efthimios Kaxiras, Joseph Checkelsky
Organizer
APS March Meeting 2021
Related Report
Int'l Joint Research
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