2021 Fiscal Year Final Research Report
Development of sensitive spin probe at solid surfaces and application to transition metal oxides
| Project/Area Number |
17H01057
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
Dino Wilson 大阪大学, 工学研究科, 准教授 (60379146)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Keywords | 固体表面 / スピン / 水素 / 電子状態 |
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| Outline of Final Research Achievements |
In the present research, we have developed spin-polarized atomic hydrogen and molecular hydrogen beams, and investigated the spin-state change in adsorption/scattering on solid surfaces in combination with laser spectroscopy. By using this apparatus, we have precisely measured the nuclear-spin conversion time in the chemisorbed state on solid surfaces. On the basis of the experimental data, we have clarified the spin conversion and rotational-energy dissipation mechanisms. We have also studied the hydrogen-induced electronic states on metal-oxide surfaces, where presence of localized and delocalized states was clearly identified.
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| Free Research Field |
表面界面物性
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| Academic Significance and Societal Importance of the Research Achievements |
固体表面は，新規電子・磁気デバイスや触媒機能発現の場として重要な役割を担う．デバイスや化学的機能性は，表面における吸着分子や表面の電子・スピン状態に大きく左右される．しかし固体表面のスピン状態やスピンダイナミクスを観測できる手法が限られているため未解明の点が多い．本研究では，表面のスピン状態を高感度に測定するためのスピン偏極水素原子・分子線の開発を行い，水素のスピンダイナミクスと種々の機能性を有する遷移金属酸化物表面の電子・スピン状態を明らかにした．
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