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ID 31969
file
creator
Jiang, J.
Hayashi, Hirokazu
Aiura, Yoshihiro
NDC
Physics
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).
journal title
Physical Review B
volume
Volume 84
issue
Issue 15
start page
155124-1
end page
155124-8
date of issued
2011-10-17
publisher
The American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2011 The American Physical Society
relation url
department
Graduate School of Science
Hiroshima Synchrotron Radiation Center