title: 4f-electron localization in CexLa 1-xM In5 with M=Co, Rh, or Ir.
abstract: 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.
authors.affiliation: National High Magnetic Field Laboratory, LANL, MS-E536, Los Alamos, New Mexico 87545, USA.
authors.forename: N
authors.initials: N
authors.lastname: Harrison
authors.forename: U
authors.initials: U
authors.lastname: Alver
authors.forename: R G
authors.initials: RG
authors.lastname: Goodrich
authors.forename: I
authors.initials: I
authors.lastname: Vekhter
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrao
authors.forename: P G
authors.initials: PG
authors.lastname: Pagliuso
authors.forename: N O
authors.initials: NO
authors.lastname: Moreno
authors.forename: L
authors.initials: L
authors.lastname: Balicas
authors.forename: Z
authors.initials: Z
authors.lastname: Fisk
authors.forename: D
authors.initials: D
authors.lastname: Hall
authors.forename: Robin T
authors.initials: RT
authors.lastname: Macaluso
authors.forename: Julia Y
authors.initials: JY
authors.lastname: Chan