2021 Fiscal Year Final Research Report
High spatial and high energy resolution electronic state mapping
Project/Area Number |
19H02597
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 29020:Thin film/surface and interfacial physical properties-related
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Research Institution | Kyoto University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
菅 大介 京都大学, 化学研究所, 准教授 (40378881)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 電子状態 / 電子軌道 / STEM / EELS |
Outline of Final Research Achievements |
The purpose of this research is to establish the local analytical technology using advanced electron microscopy which equipped monochromated electron source and spherical aberration corrector. We reported the method to measure high signal to noise ratio spectrum with very high spatial resolution. Then, we demonstrated that the extraction of local crystal field splitting and local coordination structure of metal-oxide octahedron by combining the theoretical calculation. And we reported that visualization of electron p orbital of oxygen in SrTiO3 crystal. We demonstrated that the anisotropic distribution of px, py and pz orbitals were directly visualized. These results can be used for other material to extract local information of chemical bond.
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Free Research Field |
局所電子構造解析
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Academic Significance and Societal Importance of the Research Achievements |
現在、電子顕微鏡の性能は格段に上昇し、異なる場所から異なる形状のスペクトルが原子レベルで得られる一方で、得られたスペクトル構造の解釈についてはまだ十分な理解がなされていなかった。今回の成果ではこれまでとは異なるアプローチにより新しい情報を引き出せる可能性を示したものであり、今後益々の応用が期待される。また、最終年度では電子軌道の可視化を実証したが、このことは電子顕微鏡の高分解能像研究を新たなステージに引き上げる成果であり、実験的原理実証の意義は大きい。
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