123 citations · 500 across the 15 of their papers we have counts for
4 papers · 1 filter
Numerical study of finite size effects in the one-dimensional two-impurity Anderson model
S. Costamagna, J. A. Riera
We study the two-impurity Anderson model on finite chains using numerical techniques. We discuss the departure of magnetic correlations as a function of the interimpurity distance…
Large Magnetoresistance in a Manganite Spin-Tunnel-Junction Using LaMnO3 as Insulating Barrier
S. Yunoki, E. Dagotto, S. Costamagna +1
A spin-tunnel-junction based on manganites, with LaSrMnO (LSMO) as ferromagnetic metallic electrodes and the undoped parent compound LaMnO (LMO) as insulating b…
Magnetic and transport properties of the one-dimensional ferromagnetic Kondo lattice model with an impurity
S. Costamagna, J. A. Riera
We have studied the ferromagnetic Kondo lattice model (FKLM) with an Anderson impurity on finite chains with numerical techniques. We are particularly interested in the metallic fe…
Magnetic and transport properties of a one dimensional frustrated t-J model for vanadate nanotubes
S. Costamagna, J. A. Riera
We propose a one-dimensional model consisting of a chain with a t-J Hamiltonian coupled to a Heisenberg chain in a frustrated geometry to describe the appearance of the ferromagnet…