Renormalization of bulk magnetic electron states at high binding energies.
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.
Hofmann
A
A
Physikalisches Institut, Universität Würzburg, 97074 Würzburg, Germany.
Cui
X Y
XY
Schäfer
J
J
Meyer
S
S
Höpfner
P
P
Blumenstein
C
C
Paul
M
M
Patthey
L
L
Rotenberg
E
E
Bünemann
J
J
Gebhard
F
F
Ohm
T
T
Weber
W
W
Claessen
R
R