2023 Fiscal Year Research-status Report
対称性の制御されたファンデルワールスヘテロ界面における光学応答
| Project/Area Number |
22KJ1096
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| Allocation Type | Multi-year Fund |
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| Research Institution | The University of Tokyo |
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Principal Investigator |
董 禹 東京大学, 物性研究所, 特別研究員(DC1)
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| Project Period (FY) |
2023-03-08 – 2025-03-31
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| Keywords | non-collinear spin / 2D magnets / Multiferroics |
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| Outline of Annual Research Achievements |
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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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
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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| Strategy for Future Research Activity |
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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