| 研究課題/領域番号 |
21K04883
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| 研究機関 | 九州大学 |
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研究代表者 |
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| 研究期間 (年度) |
2021-04-01 – 2024-03-31
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| キーワード | 2D materials / silicon carbide / honeycomb lattice / spin-orbit interaction / surface physics |
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| 研究実績の概要 |
(1) During this research period we have successfully grown honeycomb 2D silicon nitride layer on SiC(0001) surface. The structure of the surface has been determined by low-energy electron diffraction (LEED) analysis and match the one previously predicted by calculation. The results are also confirmed by scanning-tunneling microscopy (STM) measurements.
(2) According to research plan we intended also to try the growth of nanostructures using vicinal stepped surfaces of SiC. In anticipation of it, we have investigated the morphology and step dynamics of vicinal SiC. This was accompanied with study of graphene growth on the surface.
(3) New computational approaches (tight-binding models with unfolded band structure calculations) are in development to deepen insights.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
The experimental part of the project is experiencing delays due to unexpected technical problems with equipment both on home research base and collaborators sites. Experiments themselves also take slightly longer time than anticipated.
Although computational part of the project proceeds successfully, various specific properties state-of-the-art (magnetization, spin-polarized bands) calculations takes a bit more time than expected due to lack of computational power on hands.
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| 今後の研究の推進方策 |
(1) Finally start the growth of honeycomb Xenes on top of silicon nitride layer. As the implementation of this phase has been delayed due to various reasons. We will try to concentrate extensively on the growth and characterization to achive the goals of the project.
(2) Further delving into calculation options. Because the experiment is shifted to later phase, and there is always a risk of additional complication, we will try to heavily invest efforts into calculations, as this would prove useful even in the case of experiment failure.
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| 次年度使用額が生じた理由 |
As we trying to expend our experimental options to overcome the difficulty of sample preparations and characterization. Some equipment modifications and maintenance work at home base are planned for next year.
As some of collaborations are moving no new sites, extensive travel is required to inspect and setup corresponding equipment and organize the work.
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