Probing the coulomb interaction of the unconventional superconductor by phonon spectroscopy.
The phonon dispersion curves of the superconductor PuCoGa(5) were studied by inelastic x-ray scattering at room temperature. The experimental data agree well with ab initio lattice dynamics calculations. An accurate description of the phonon spectrum is obtained only when a local Coulomb repulsion U approximately equal 3 eV among 5f electrons is taken into account.
Raymond
S
S
CEA-DSM/Département de Recherche Fondamentale sur la Matière Condensée/SPSMS, 38054 Grenoble, France.
Piekarz
P
P
Sanchez
J P
JP
Serrano
J
J
Krisch
M
M
Janousová
B
B
Rebizant
J
J
Metoki
N
N
Kaneko
K
K
Jochym
P T
PT
Oleś
A M
AM
Parlinski
K
K