Electronic Structure and Nesting-Driven Enhancement of the RKKY Interaction at the Magnetic Ordering Propagation Vector in Gd2PdSi3 and Tb2PdSi3

D. S. Inosov, D. V. Evtushinsky, A. Koitzsch, V. B. Zabolotnyy, S. V. Borisenko, A. A. Kordyuk, M. Frontzek, M. Loewenhaupt, W. Löser, I. Mazilu, H. Bitterlich, G. Behr, J.-U. Hoffmann, R. Follath, and B. Büchner
Phys. Rev. Lett. 102, 046401 – Published 26 January 2009

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 Γ point surrounded by spindle-shaped electron pockets originating from the same band. The calculated momentum-dependent RKKY coupling strength is peaked at the 12ΓK 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.

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  • Received 21 August 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.046401

©2009 American Physical Society

Authors & Affiliations

D. S. Inosov1,2, D. V. Evtushinsky1, A. Koitzsch1, V. B. Zabolotnyy1, S. V. Borisenko1, A. A. Kordyuk1,3, M. Frontzek4, M. Loewenhaupt4, W. Löser1, I. Mazilu1, H. Bitterlich1, G. Behr1, J.-U. Hoffmann5, R. Follath6, and B. Büchner1

  • 1Leibniz Institut für Festkörper- und Werkstoffforschung Dresden, D-01171 Dresden, Germany
  • 2Max-Planck-Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany
  • 3Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine
  • 4Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany
  • 5Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin, Germany
  • 6BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany

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Vol. 102, Iss. 4 — 30 January 2009

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