Renormalization of Bulk Magnetic Electron States at High Binding Energies

Details Renormalization of Bulk Magnetic Electron States at High Binding Energies Renormalization of Bulk Magnetic Electron States at High Binding Energies

2009-04-15

arxiv.org/abs/0904.2344v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, accepted at Phys. Rev. Lett.

Scientific paper

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.

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