title: Electronic structure and nesting-driven enhancement of the RKKY interaction at the magnetic ordering propagation vector in Gd2PdSi3 and Tb2PdSi3.
abstract: Measurements of the low-energy electronic structure in Gd2PdSi3 and Tb2PdSi3 by means of angle-resolved photoelectron spectroscopy reveal a Fermi surface consisting of an electron barrel at the Gamma point surrounded by spindle-shaped electron pockets originating from the same band. The calculated momentum-dependent RKKY coupling strength is peaked at the 1/2GammaK wave vector, which coincides with the propagation vector of the low-temperature in-plane magnetic order observed by neutron diffraction, thereby demonstrating the decisive role of the Fermi surface geometry in explaining the complex magnetic ground state of ternary rare earth silicides.
authors.affiliation: Leibniz Institut für Festkörper- und Werkstoffforschung Dresden, D-01171 Dresden, Germany.
authors.forename: D S
authors.initials: DS
authors.lastname: Inosov
authors.forename: D V
authors.initials: DV
authors.lastname: Evtushinsky
authors.forename: A
authors.initials: A
authors.lastname: Koitzsch
authors.forename: V B
authors.initials: VB
authors.lastname: Zabolotnyy
authors.forename: S V
authors.initials: SV
authors.lastname: Borisenko
authors.forename: A A
authors.initials: AA
authors.lastname: Kordyuk
authors.forename: M
authors.initials: M
authors.lastname: Frontzek
authors.forename: M
authors.initials: M
authors.lastname: Loewenhaupt
authors.forename: W
authors.initials: W
authors.lastname: Löser
authors.forename: I
authors.initials: I
authors.lastname: Mazilu
authors.forename: H
authors.initials: H
authors.lastname: Bitterlich
authors.forename: G
authors.initials: G
authors.lastname: Behr
authors.forename: J-U
authors.initials: JU
authors.lastname: Hoffmann
authors.forename: R
authors.initials: R
authors.lastname: Follath
authors.forename: B
authors.initials: B
authors.lastname: Büchner