We describe a general method to study the ground-state phase diagram of electronic models on chains whose extended Hubbard Hamiltonian is formed by a generalized permutator plus a band-controlling term. The method, based on the appropriate interpretation of Sutherland’s species, yields under described conditions a reduction of the effective Hilbert space. In particular, we derive the phase diagrams of two new models; the first one exhibits a band-controlled insulator-superconductor transition at half-filling for the unusually high value Uc=6t; the second one is characterized by a filling-controlled metal-insulator transition between two finite regions of the diagram.
Band and filling controlled transitions in exactly solved electronic models / DOLCINI F.; MONTORSI A.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 63:12(2001), pp. 121103-1-121103-4. [10.1103/PhysRevB.63.121103]
|Titolo:||Band and filling controlled transitions in exactly solved electronic models|
|Data di pubblicazione:||2001|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevB.63.121103|
|Appare nelle tipologie:||1.1 Articolo in rivista|