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11 papers · 1 filter
Two-state behaviour of Kondo trimers
M. E. Torio, K. Hallberg, C. R. Proetto
The electronic properties and spectroscopic features of a magnetic trimer with a Kondo-like coupling to a non-magnetic metallic substrate are analyzed at zero temperature. The subs…
Quantum phase diagram of the generalized ionic Hubbard model for AB chains
M. E. Torio, A. A. Aligia, G. I. Japaridze +1
We investigate the ground-state phase diagram of the Hubbard model for the AB chain with filling 1/N, where is the number of atoms per unit cell. In the strong-coupling…
Magnetization plateaux induced by a coupling to the lattice
T. Vekua, D. C. Cabra, A. Dobry +2
We investigate a simple model of a frustrated spin-1/2 Heisenberg chain coupled to adiabatic phonons under an external magnetic field. Using field theoretic methods complemented by…
Signatures of electron-electron correlations in the optical spectra of -(BEDT-TTF)Hg(SCN) (=NH and Rb)
N. Drichko, M. Dressel, A. Greco +2
We interpret the optical spectra of -(BEDT-TTF)Hg(SCN) (M=NH and Rb) in terms of a 1/4 filled metallic system close to charge ordering and show that in the conducti…
Inhomogeneous charge textures stabilized by electron-phonon interactions in the t-J model
Jose Riera, Adriana Moreo
We study the effect of diagonal and off-diagonal electron-phonon coupling in the ground state properties of the t-J model. Adiabatic and quantum phonons are considered using Lanczo…
Pressure dependence of the melting mechanism at the limit of overheating in Lennard-Jones crystals
L. Gómez, C. Gazza, H. Dacharry +2
We study the pressure dependence of the melting mechanism of a surface free Lennard-Jones crystal by constant pressure Monte Carlo simulation. The difference between the overheatin…