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ID 31969
本文ファイル
著者
Jiang, J.
Hayashi, Hirokazu
Aiura, Yoshihiro
NDC
物理学
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).
掲載誌名
Physical Review B
84巻
15号
開始ページ
155124-1
終了ページ
155124-8
出版年月日
2011-10-17
出版者
The American Physical Society
ISSN
1098-0121
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
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フォーマット
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著者版フラグ
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権利情報
Copyright (c) 2011 The American Physical Society
関連情報URL
部局名
理学研究科
放射光科学研究センター