Role of the attractive intersite interaction in the extended Hubbard model Export

@article{citeulike:3784003, abstract = {We consider the extended Hubbard model in the atomic limit on a Bethe lattice with coordination number z. By using the equations of motion formalism, the model is exactly solved for both attractive and repulsive intersite potential V. By focusing on the case of negative V, i.e., attractive intersite interaction, we study the phase diagram at finite temperature and find, for various values of the filling and of the on-site coupling U, a phase transition towards a state with phase separation. We determine the critical temperature as a function of the relevant parameters, U/|V|, n and z and we find a reentrant behavior in the plane (U/|V|,T). Finally, several thermodynamic properties are investigated near criticality.}, archivePrefix = {arXiv}, author = {Mancini, F. and Mancini, F. P. and Naddeo, A.}, citeulike-article-id = {3784003}, citeulike-linkout-0 = {http://arxiv.org/abs/0811.3310}, citeulike-linkout-1 = {http://arxiv.org/pdf/0811.3310}, day = {20}, eprint = {0811.3310}, keywords = {bethe, hubbard}, month = {Nov}, posted-at = {2008-12-13 10:53:56}, priority = {2}, title = {Role of the attractive intersite interaction in the extended Hubbard model}, url = {http://arxiv.org/abs/0811.3310}, year = {2008} }

TY - JOUR ID - citeulike:3784003 L3 - citeulike-article-id:3784003 N2 - We consider the extended Hubbard model in the atomic limit on a Bethe lattice with coordination number z. By using the equations of motion formalism, the model is exactly solved for both attractive and repulsive intersite potential V. By focusing on the case of negative V, i.e., attractive intersite interaction, we study the phase diagram at finite temperature and find, for various values of the filling and of the on-site coupling U, a phase transition towards a state with phase separation. We determine the critical temperature as a function of the relevant parameters, U/|V|, n and z and we find a reentrant behavior in the plane (U/|V|,T). Finally, several thermodynamic properties are investigated near criticality. TI - Role of the attractive intersite interaction in the extended Hubbard model KW - bethe KW - hubbard AU - Mancini, F AU - Mancini, FP AU - Naddeo, A PY - 2008/Nov/20/ UR - http://arxiv.org/abs/0811.3310 ER -