Coupling parameters of many-body interactions for the Al(100) surface state : A high-resolution angle-resolved photoemission spectroscopy study
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ID | 31969 |
本文ファイル | |
著者 |
Jiang, J.
Hayashi, Hirokazu
Aiura, Yoshihiro
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NDC |
物理学
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抄録(英) | We examined the dimensionless coupling parameters of many-body interactions for a free-electron-like surface-derived state in Al(100) by means of high-resolution angle-resolved photoemission spectroscopy. A kink structure was found to exist in the energy-band dispersion near the Fermi level (E_F), which was attributed to the electron-phonon interaction. At 50 K, the coupling parameters of the electron-phonon and electron-electron interactions were estimated as λ_<ep>=0.67±0.05 and λ_<ee>~0.003, respectively, indicating that the effective mass enhancement was mainly derived from the electron-phonon interaction. The temperature dependence of the kink structure, as measured by λ_<ep>(T), was consistent with a theoretical calculation based on the Eliashberg function. A quasiparticle peak with a width of 15-20 meV was found near E_F, which was explained well by the simulated spectral function incorporating the self-energy evaluated in this study. We found that the electrons at the surface were strongly scattered by the defects at the surface and that the linewidth was significantly broadened (Γ_0=0.238±0.006 eV).
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掲載誌名 |
Physical Review B
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巻 | 84巻
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号 | 15号
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開始ページ | 155124-1
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終了ページ | 155124-8
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出版年月日 | 2011-10-17
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出版者 | The American Physical Society
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ISSN | 1098-0121
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NCID | |
出版者DOI | |
言語 |
英語
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NII資源タイプ |
学術雑誌論文
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広大資料タイプ |
学術雑誌論文
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DCMIタイプ | text
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フォーマット | application/pdf
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著者版フラグ | publisher
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権利情報 | Copyright (c) 2011 The American Physical Society
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関連情報URL | |
部局名 |
理学研究科
放射光科学研究センター
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