Quantum properties of low-dimensional hybrid spin networks at surfaces
| Project/Area Number |
20K05326
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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 | Kyoto University |
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Principal Investigator |
Takagi Noriaki 京都大学, 人間・環境学研究科, 教授 (50252416)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 表面 / ナノサイエンス / 走査トンネル顕微鏡 / 走査トンネル分光 / 走査型トンネル顕微鏡 / グラフェン / 分子 / 吸着 / 表面分子スピン |
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| Outline of Research at the Start |
量子揺らぎの影響が大きく、より多彩な量子相と転移現象が期待できる低次元スピンネットワークに関する現実物質での実験研究は未開拓分野である。本研究では、表面科学や錯体化学の知見に基づいて、次元や対称性を仕立てた有機分子・磁性原子からなる有機・無機ハイブリッド低次元スピンネットワークを固体表面に構築する。走査型トンネル顕微鏡や光電子分光、第一原理計算を用い、その多様な量子物性と発現機構を解明する。
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| Outline of Final Research Achievements |
The structures and the electronic structures of magnetic species and their network formed at surfaces were investigated mainly by scanning tunneling microscopy (STM). Important findings are as follows: For the adsorption of iron phthalocyanine molecules on Ag(111), (110) and (100) surfaces, interesting superstructures were observed for the bilayer. On the (110) surface, one-dimensional clusters were formed, which were arranged into two-dimensional array. On the (100) surface, square clusters were formed and the clusters made a network like checkerboard. Inside the clusters, each molecule showed site-specific tunneling spectrum. For the adsorption of manganese phthalocyanine on superconducting In bilayer on Si(111), spectral evolution was observed. At low coverages, Yu-Shiba-Rusinov state appeared, which evolved to anti ferromagnetic Kondo lattice state in the high coverage where the molecule formed a superstructure.
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| Academic Significance and Societal Importance of the Research Achievements |
表面に吸着した分子系では、自己組織的に超構造が見られる。2層目で基板の面方位によって異なる超構造が観測されたことは、学術的に興味深い。磁性分子による反強磁性近藤格子の形成は珍しく、その機構解明は、広く強相関電子系の学術的発展につながるものと期待される。
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Report
(4 results)
Research Products
(10 results)
