Coupling parameters of many-body interactions for the Al(100) surface state : A high-resolution angle-resolved photoemission spectroscopy study
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00031969
ID | 31969 |
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creator |
Jiang, J.
Hayashi, Hirokazu
Aiura, Yoshihiro
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NDC |
Physics
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abstract | 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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journal title |
Physical Review B
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volume | Volume 84
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issue | Issue 15
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start page | 155124-1
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end page | 155124-8
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date of issued | 2011-10-17
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publisher | The American Physical Society
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issn | 1098-0121
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ncid | |
publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | Copyright (c) 2011 The American Physical Society
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relation url | |
department |
Graduate School of Science
Hiroshima Synchrotron Radiation Center
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