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ID 19344
file
creator
Higashiguchi, Mitsuharu
Nishiura, Keisuke
Cui, Xiaoyu
subject
nickel
ferromagnetic materials
quasiparticles
photoelectron spectra
band structure
electron-phonon interactions
electron correlations
Fermi level
effective mass
abstract
High-resolution angle-resolved photoelectron spectroscopy of ferromagnetic Ni(110) has been conducted to elucidate energy band and spin-dependent many-body interactions. A kink structure has been clearly observed in the energy band dispersions of the minority spin Σ2↓ and Σ1↓, while it is absent in the majority spin Σ1↑ band. Analyses of the self-energy indicate that the kink originates from the electron-phonon interaction. Based on a detailed study of the effective mass enhancement, we find that the electron-phonon interaction and electron correlation contribute to the spectral features near the Fermi level in different ways, depending on the identity of the energy band and the spin direction. These results provide insight into the interplay of these many-body interactions on quasiparticles near the Fermi level.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 72
start page
214438-1
end page
214438-5
date of issued
2005-12-03
publisher
American Physical Society
issn
0163-1829
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) 2005 The American Physical Society.
relation url
department
Graduate School of Science
Hiroshima Synchrotron Radiation Center