Momentum distribution and renormalization factor in sodium and the electron gas.
We present experimental and theoretical results on the momentum distribution and the quasiparticle renormalization factor in sodium. From an x-ray Compton-profile measurement of the valence-electron-momentum density, we derive its discontinuity at the Fermi wave vector. This yields an accurate measure of the renormalization factor that we compare with quantum Monte Carlo and G0W0 calculations performed both on crystalline sodium and on the homogeneous electron gas.
Huotari
Simo
S
European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France.
Soininen
J Aleksi
JA
Pylkkänen
Tuomas
T
Hämäläinen
Keijo
K
Issolah
Arezki
A
Titov
Andrey
A
McMinis
Jeremy
J
Kim
Jeongnim
J
Esler
Ken
K
Ceperley
David M
DM
Holzmann
Markus
M
Olevano
Valerio
V