| 研究課題/領域番号 |
22KJ1096
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| 補助金の研究課題番号 |
22J22007 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分13020:半導体、光物性および原子物理関連
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| 研究機関 | 東京大学 |
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研究代表者 |
董 禹 東京大学, 物性研究所, 特別研究員(DC1)
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| 研究期間 (年度) |
2023-03-08 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,500千円 (直接経費: 2,500千円)
2024年度: 800千円 (直接経費: 800千円)
2023年度: 800千円 (直接経費: 800千円)
2022年度: 900千円 (直接経費: 900千円)
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| キーワード | non-collinear spin / 2D magnets / Multiferroics / 3R MoS2 / bulk photovoltaic effect / strain |
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| 研究開始時の研究の概要 |
Symmetry engineering is a simple but pioneering way to play with the symmetry of van der Waals materials. In my research, we want to demonstrate it by a magnet/magnet interface CrSBr/CrPS4 to create in-plane polarization by non-collinear spin structure at this interface, which is so-called artificial "multiferroics".
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| 研究実績の概要 |
In the past year, I focused on the research of magnet/magnet interface to study the non-collinear spin structure in 2D magnets. First, I studied the combination of CrSBr/CrPS4 to create the in-plane and out-of-plane spin structure, but it didn’t work well. Then I changed to CrI3/CrCl3 interface combination, and primitive data to prove the non-collinear spins has been collected. Further experiments are on-going and paper writing will start after more data is obtained. Besides, a paper on 2D multiferroic material CuCrP2S6 is published in Advance Materials, and I was listed as the second author.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
In the past year, I first spent several month on device fabrication and measurement system upgrade. Now, my lab is capable to handle air-sensitive CrI3 and CrCl3 to make interface. After fabricating several monolayer CrI3/ few layer CrCl3 interface sample, I have accumulated much experiences on handling them. Also, primitive data to understand the physics in this interface is obtained. Now, we have develop a general story line for the non-collinear spins in CrI3/CrCl3. The next step is to collect high quality data from more CrI3/CrCl3 samples. To conclude, I think my project is carrying on as planned.
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| 今後の研究の推進方策 |
My plan for this year's research is to finish the CrI3/CrCl3 interface project. It is the spin engineering work based on 2D magnets. The non-collinear spin can lead to polarization by the inverse DM interaction. After this interface project, I want to focus on CrSBr, another novel 2D magnets stable in air. CrSBr also shows interesting magnetic phase transition (from antiferromagnetic to ferromagnetic phase) under an uniaxial strain. I want to realize non-collinear spin structure in CrSBr by applying a non-uniform strain. This project will be a carry-on work for both the research of non-collinear spins and strain engineering.
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