4f-electron localization in CexLa 1-xM In5 with M=Co, Rh, or Ir.
de Haas-van Alphen measurements on Ce(x)La(1-x)MIn(5) yield contrasting types of behavior that depend on whether M=Co and Ir or M=Rh. A stronger x-dependent scattering in the case of M=Co and Ir is suggestive of a stronger relative coupling, J/W, of the conduction electrons to the 4f electrons, which would then account for the development of a heavy composite Fermi-liquid state as x-->1. The failure of a composite Fermi-liquid state to form for any x in the case of M= Rh is shown to be inconsistent with theoretical models that propose antiferromagnetism to result from spin-density-wave formation.
Harrison
N
N
National High Magnetic Field Laboratory, LANL, MS-E536, Los Alamos, New Mexico 87545, USA.
Alver
U
U
Goodrich
R G
RG
Vekhter
I
I
Sarrao
J L
JL
Pagliuso
P G
PG
Moreno
N O
NO
Balicas
L
L
Fisk
Z
Z
Hall
D
D
Macaluso
Robin T
RT
Chan
Julia Y
JY