| アイテムタイプ |
会議発表用資料 / Presentation(1) |
| 公開日 |
2025-07-18 |
| タイトル |
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|
タイトル |
Theoretical study of X-ray Photoemission Spectroscopy Magnetic Circular Dichroism for Itinerant Ferromagnetic 3d Transition Metals |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6670 |
|
資源タイプ |
conference poster |
| 著者 |
Kobayashi Hiroki
Ueki Aimi
Nomura Takuji
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| 抄録 |
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内容記述 |
X-ray Photoemission Spectroscopy Magnetic Circular Dichroism (XPS-MCD) is a powerful tool for probing element-specific magnetic properties of materials. XPS-MCD measures the difference in the number of photoelectrons when right- and left-handed circular polarized X-rays are irradiated onto a magnetized material. While theoretical approaches based on atomic and cluster models have been widely used, they fail to accurately reproduce experimental spectra of transition metals such as Co due to the itinerant nature of their electronic states. In this study, we develop a calculation method incorporating electron-hole pair excitations on 3d bands as many-body effects. In our approach, ground-state electronic structures are determined by first-principles band calculations. Using Keldysh Green’s function technique for nonequilibrium states, we calculate XPS-MCD spectra within both lowest- and higher-order perturbation. We demonstrate that our method successfully reproduces experimental XPS-MCD spectra, highlighting the importance of both itinerancy and electron-hole pair excitations in 3d transition metals. This study provides new insights into the mechanisms governing XPS-MCD spectra and establishes a theoretical framework for analyzing magnetic properties in materials. |
| 会議概要（会議名, 開催地, 会期, 主催者等） |
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内容記述 |
Conference on Strongly Correlated Electron Systems 2025 |
| 発表年月日 |
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日付 |
2025-07-07 |
