The quasiparticle dynamics of electrons in a magnetically ordered state is investigated by high-resolution angle-resolved photoemission of Ni(110) at 10 K. The self-energy is extracted for high binding energies reaching up to 500 meV, using a Gutzwiller calculation as a reference frame for correlated quasiparticles. Significant deviations exist in the 300 meV range, as identified on magnetic bulk bands for the first time. The discrepancy is strikingly well described by a self-energy model assuming interactions with spin excitations. Implications relating to different electron-electron correlation regimes are discussed.
@article{arxiv.0904.2344,
title = {Renormalization of Bulk Magnetic Electron States at High Binding Energies},
author = {A. Hofmann and X. Y. Cui and J. Schaefer and S. Meyer and P. Hoepfner and C. Blumenstein and M. Paul and L. Patthey and E. Rotenberg and J. Buenemann and F. Gebhard and T. Ohm and W. Weber and R. Claessen},
journal= {arXiv preprint arXiv:0904.2344},
year = {2015}
}