Spin and charge orderings in the atomic limit of the U-V-J model

Abstract

In this paper we study a generalization of the 1D Hubbard model by considering density-density and Ising-type spin-spin nearest neighbor (NN) interactions, parameterized by $V$ and $J$, respectively. We present the T=0 phase diagram for both ferro ($J>0$) and anti-ferro ($J<0$) coupling obtained in the narrow-band limit by means of an extension to zero-temperature of the transfer-matrix method. Based on the values of the Hamiltonian parameters, we identify a number of phases that involve orderings of the double occupancy, NN density and spin correlations, being these latter very fragile.

4 pages, 2 figures, SCES2011 Proceedings

References in corpus (3)

• The Hubbard model within the equations of motion approach
• One-dimensional extended Hubbard model in the atomic limit
• Triplet superconductivity in a 1D itinerant electron system with transverse spin anisotropy

Cited by in corpus (3)

• Some properties of two dimensional extended repulsive Hubbard model with intersite magnetic interactions - a Monte Carlo study
• Superconductivity, metastability and magnetic field induced phase separation in the atomic limit of the Penson-Kolb-Hubbard model
• Some exact results for the zero-bandwidth extended Hubbard model with intersite charge and magnetic interactions