| Project/Area Number |
21K04873
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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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| Review Section |
Basic Section 29020:Thin film/surface and interfacial physical properties-related
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
米田 忠弘 東北大学, 多元物質科学研究所, 教授 (30312234)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | Radio frequency / Spin / STM / radiofrequency / PAT / SC-PAT / superconductor / YSR / IETS / TbPc / Super Conductor / Photo Assisted Tunneling |
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| Outline of Research at the Start |
電子のスピン自由度を用いたデバイスに関心高まるが、その理由の一部は量子コンピューターを始めとする量子情報処理への需要の高まりがある。量磁性分子はスピンキュービットの候補として大きな可能性を持っている。しかしながら従来から用いられるESR・NMR手法は多数の分子を対象とする測定手法であり、微小領域で新しい分析手法の開発が必要である。本申請は新奇な単一分子単位でのスピン分析手法として、ＲＦマイクロ波を照射したときに得られる超伝導接合における超伝導光アシストトンネル効果を利用し、磁性体の化学分析能力を備えた磁性検出顕微鏡を開発することを目標とする。
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| Outline of Final Research Achievements |
Combining radio frequency (RF) signals in scanning tunneling microscopy (STM) attracts attention for electron spin resonance detection of a single molecule. We inject an RF signal in the STM tunneling junction, which contains a radical molecule of TOV at the sample temperature of 400 mK. We detected the RF derived signature in the kondo resonance that originated from spin. We propose a model to modify the Tien-Gordon model for the photon-assisted tunneling (PAT) process by introducing the electron-photon coupling constant. This work suggests a pathway to tuning the electron-photon coupling constant in the RF region. In separated study, we found a new method to control the exchange interaction energy in the SMM, TbPc2, which is critical parameter to use the Tb 4f spin for the quantum information process.
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| Academic Significance and Societal Importance of the Research Achievements |
This work may allow for tuning of the electron-photon coupling constant in the RF region which has implications for the future spintronics. We found a way to control the exchange interaction energy in TbPc2 molecule which is crucial for utilizing the Tb 4f spin for quantum information processing.
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