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5 papers · 2 filters
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…
1/T_1 nuclear relaxation time of κ-(BEDT-TTF)_ 2 Cu [N(CN)_2] Cl : effects of magnetic frustration
I. J. Hamad, A. E. Trumper, P. Wzietek +2
We study the role played by the magnetic frustration in the antiferromagnetic phase of the organic salt κ-(BEDT-TTF)_ 2 Cu [N(CN)_2] Cl. Using the spatially anisotropic triangular…