2022 Fiscal Year Final Research Report
Spin-polarized STM study on chiral molecules
Project/Area Number |
21K18888
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 29:Applied condensed matter physics and related fields
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Research Institution | Tohoku University |
Principal Investigator |
Oka Hirofumi 東北大学, 材料科学高等研究所, 助教 (70374600)
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Project Period (FY) |
2021-07-09 – 2023-03-31
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Keywords | スピン偏極STM / キラル分子 / キラティ誘起スピン偏極 |
Outline of Final Research Achievements |
Recently, chirality-induced spin selectivity has attracted much attention. However, there has been remaining a lot of unclear issues on its microscopic physical origin. In this study, we investigated spin filter effect of a chiral molecule, cysteine, at the molecular scale using spin-polarized scanning tunneling microscopy (STM). We prepared D-cysteine dimers and L-cysteine dimers on Au(110) substrate, which were identified in STM topographic images. Spin-polarized STM revealed that electrons passing through the cysteine dimers did not show clear spin polarization within the detection limit.
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Free Research Field |
表面電子物性
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Academic Significance and Societal Importance of the Research Achievements |
キラル分子・システインでは有意なスピンフィルター効果は得られなかった。ごく最近の研究では、分子のスピンフィルター効果には分子の「キラリティ」だけでなく「螺旋性」も重要であることが示唆されており、システインは平面的な分子で螺旋性を示さないことから、上記のような結果が得られたと考えられる。本研究により、キラティ誘起スピン偏極という興味深い現象の微視的なメカニズムについて新たな知見を得ることができた。
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