132 citations · 326 across the 11 of their papers we have counts for
6 papers · 1 filter
Magnetic and orbital ordering of RuO2 planes in RuSr2(Eu,Gd)Cu2O8
A. A. Aligia, M. A. Gusmao
We start from an effective Hamiltonian for Ru ions in a square lattice, which includes the on-site interactions between t_2g orbitals derived from Coulomb repulsion, and a tetragon…
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…
Superconductivity in the Kondo lattice: a mean-field approach
M. A. Gusmao, A. A. Aligia
We calculate the superconducting critical temperature T_c and the Kondo temperature T_K of the Kondo lattice, decoupling the Kondo exchange interaction in the unrestricted Hartree-…
Low-temperature specific heat of La0.78Pb0.22MnO3-d manganite
L. Ghivelder, R. S. Freitas, R. E. Rapp +3
The specific heat of the perovskite manganite La0.78Pb0.22MnO3-d was measured from 0.5 to 25 K. The results yield values of the electronic density of states, the Debye temperature,…
Effect of band filling in the Kondo lattice: A mean-field approach
A. R. Ruppenthal, J. R. Iglesias, M. A. Gusmão
The usual Kondo-lattice, including an antiferromagnetic exchange interaction between nearest-neighboring localized spins, is treated here in a mean-field scheme that introduces two…
Electronic and phononic states of the Holstein-Hubbard dimer of variable length
M. Acquarone, J. R. Iglesias, M. A. Gusmao +2
We consider a model Hamiltonian for a dimer including all the electronic one- and two-body terms consistent with a single orbital per site, a free Einstein phonon term, and an elec…