Now showing items 1-6 of 6

    • Application of the underscreened Kondo lattice model to neptunium compounds 

      Thomas, Christopher; Simoes, Acirete Souza da Rosa; Iglesias, Jose Roberto; Lacroix, Claudine; Coqblin, Bernard (2012) [Journal article]
      The coexistence of Kondo e®ect and ferromagnetic order has been observed in many uranium and neptunium compounds such as UTe or Np2PdGa3. This coexistence can be described within the underscreened Anderson lattice model ...
    • Band-filling effects on Kondo-lattice properties 

      Coqblin, Bernard; Lacroix, Claudine; Gusmao, Miguel Angelo Cavalheiro; Iglesias, Jose Roberto (2003) [Journal article]
      We present theoretical results for a Kondo-lattice model with spin-1/2 localized moments, including both the intrasite Kondo coupling and an intersite antiferromagnetic exchange interaction, treated within an extended ...
    • Phase diagram for the Anderson lattice model 

      Bernhard, Ben Hur; Lacroix, Claudine; Iglesias, Jose Roberto; Coqblin, Bernard (2000) [Journal article]
      We study the competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interaction in the framework of the Anderson lattice model with an extra intersite exchange term. By using an approximation based on ...
    • Revisited doniach diagram : influence of short-range antiferromagnetic correlations in the Kondo lattice 

      Iglesias, Jose Roberto; Lacroix, Claudine; Coqblin, Bernard (1997) [Journal article]
      The Kondo lattice model including nearest-neighbor magnetic exchange interactions is studied here in a mean-field approximation describing both the Kondo state and the intersite magnetic correlations. In the case of ...
    • Spin liquid versus long-range magnetic order in the frustrated body-centered-tetragonal lattice 

      Farias, Carlene; Thomas, Christopher; Pépin, Catherine; Ferraz, Álvaro; Lacroix, Claudine; Burdin, Sébastien (2016) [Journal article]
      We show how spin-liquid (SL) states can be stabilized in a realistic three-dimensional model as a result of frustration. SU(n)-symmetric generalization of the Heisenberg model for quantum spin S operators is used to ...
    • The S=1 underscreened anderson lattice model for uranium compounds 

      Thomas, Christopher; Simoes, Acirete Souza da Rosa; Iglesias, Jose Roberto; Lacroix, Claudine; Perkins, Natalia B.; Coqblin, Bernard (2011) [Journal article]
      Magnetic properties of uranium and neptunium compounds showing coexistence of the Kondo e®ect and ferromagnetic order are investigated within the degenerate Anderson Lattice Hamiltonian, describing a 5f2 electronic ...