68 citations · 406 across the 18 of their papers we have counts for
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Effect of anisotropy in the underscreened Kondo lattice
Christopher Thomas, Acirete S. da Rosa Simões, Claudine Lacroix +2
We study the effect of crystal field anisotropy in the underscreened Kondo lattice model. Starting from the two orbital Anderson lattice model and including a local anisotrop…
Application of the S=1 underscreened Anderson lattice model to Kondo uranium and neptunium compounds
Christopher Thomas, Acirete S. da Rosa Simões, J. R. Iglesias +3
Magnetic properties of uranium and neptunium compounds showing the coexistence of Kondo screening effect and ferromagnetic order are investigated within the Anderson lattice Hamilt…
A van Hemmen-Kondo model for disordered strongly correlated electron systems
S. G. Magalhaes, F. M. Zimmer, B. Coqblin
We present here a theoretical model in order to describe the competition between the Kondo effect and the spin glass behavior. The spin glass part of the starting Hamiltonian conta…
A theoretical study of the cluster glass-Kondo-magnetic disordered alloys
F. M. Zimmer, S. G. Magalhães, B. Coqblin
The physics of disordered alloys, such as typically the well known case of CeNi1-xCux alloys, showing an interplay among the Kondo effect, the spin glass state and a magnetic order…
The underscreened Kondo lattice model applied to heavy fermion uranium compounds
N. B. Perkins, M. D. Nunez-Regueiro, B. Coqblin +1
We present theoretical results for the underscreened Kondo lattice model with localized S=1 spins coupled to a conduction band through a Kondo coupling, , and interacting amon…
Doniach diagram for ordered, disordered and underscreened Kondo lattices
B. Coqblin, J. R. Iglesias, N. B. Perkins +2
The Doniach's diagram has been originally proposed to describe the competition between the local Kondo effect and the intersite RKKY interactions in cerium compounds. Here we discu…
Coexistence of ferromagnetism and Kondo effect in uranium compounds
N. B. Perkins, J. R. Iglesias, M. D. Nunez-Regueiro +1
Coexistence between ferromagnetic order and Kondo behavior has been observed in some uranium compounds. The underscreened Kondo lattice model can provide a possible description of…
Spin Glass and ferromagnetism in disordered Cerium compounds
S. G. Magalhaes, F. M. Zimmer, P. R. Krebs +1
The competition between spin glass, ferromagnetism and Kondo effect is analysed here in a Kondo lattice model with an inter-site random coupling between the localized magn…
Quantum critical point in the spin glass-antiferromagnetism competition in Kondo-lattice systems
S. G. Magalhaes, F. M. Zimmer, B. Coqblin
A theory is proposed to describe the competition among antiferromagnetism (AF), spin glass (SG) and Kondo effect. The model describes two Kondo sublattices with an intrasite Kondo…
The spin glass-antiferromagnetism competition in Kondo-lattice systems in the presence of a transverse applied magnetic field
S. G. Magalhaes, F. M. Zimmer, B. Coqblin
A theory is proposed to describe the competition among antiferromagnetism (AF), spin glass (SG) and Kondo effect. The model describes two Kondo sublattices with an intrasite Kondo…
High-pressure transport properties of CeRu_2Ge_2
H. Wilhelm, D. Jaccard, V. Zlatic +3
The pressure-induced changes in the temperature-dependent thermopower S(T) and electrical resistivity ρ(T) of CeRu_2Ge_2 are described within the single-site Anderson model. The Ce…
Quantum Critical Point in the Spin Glass-Kondo Transition in Heavy Fermion Systems
Alba Theumann, B. Coqblin
The Kondo-Spin Glass competition is studied in a theoretical model of a Kondo lattice with an intra-site Kondo type exchange interaction treated within the mean field approximation…
Spin Glass and antiferromagnetism in Kondo lattice disordered systems
S. G. Magalhaes, A. A. Schmidt, F. M. Zimmer +2
The competition between spin glass (SG), antiferromagnetism (AF) and Kondo effect is studied here in a model which consists of two Kondo sublattices with a gaussian random interact…
Band-filling effects on the Kondo-lattice properties
B. Coqblin, C. Lacroix, M. A. Gusmão +1
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 in…
Spin Glass and Ferromagnetism in Kondo lattices compounds
S. G. Magalhaes, A. A. Schmidt, Alba Theumann +1
The Kondo lattice model has been analyzed in the presence of a random inter-site interaction among localized spins with non zero mean Jo and standard deviation J. Following the sam…
Thermoelectric power of Cerium and Ytterbium intermetallics
V. Zlatic, I. Milat, B. Coqblin +1
Temperature dependence S(T) of the thermoelectric power of metallic systems with cerium and ytterbium ions exhibits some characteristic features, which can be used to classify thes…
The underscreened Kondo effect: a two S=1 impurity model
Karyn Le Hur, B. Coqblin
The underscreened Kondo effect is studied within a model of two impurities S=1 interacting with the conduction band and via an interimpurity coupling . Using…