| 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(PD)
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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 |
完了 (2024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 | polarization / bulk photovoltaic effect / SHG / 2D materials / non-collinear spin / 2D magnets / Multiferroics / 3R MoS2 / 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 |
During the three years ofJSPS DC1 and PD fellowship, I completed three projects.
The first one is the second harmonic generation (SHG) research on twisted WSe2/black phosphorus interface. We found that the in-plane polarization can be further tuned by the twist angle between WSe2 and BP. The manuscript is in preparation. The second one is the bulk piezo-photovoltaic effect in 3R-MoS2. We engineered the rotational symmetry of 3R-MoS2 by uniaxial strain and greatly enhanced its photocurrent response. This work is published in Nature Nanotechnology. The third one is SHG response of CrI3/CrCl3 interface. The polarization and toroidal moment are generated by the non-collinear spin structure formed in this magnet interface. The paper of this work is in preparation.
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