2021 Fiscal Year Final Research Report

Detection and control of Majorana zero modes in topological insulator / superconductor heterojunctions

Research Project

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Project/Area Number	19K23415
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Multi-year Fund
Review Section	0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
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)
Project Period (FY)	2019-08-30 – 2022-03-31
Keywords	トポロジカル絶縁体 / ジョセフソン接合
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.
Free Research Field	物性物理
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。