info:eu-repo/semantics/article
Effect of charge-spin separation on the conductance through interacting low-dimensional rings
Fecha
2009-10Registro en:
Jimenez Rincon, Jose Julian; Hallberg, Karen Astrid; Aligia, Armando Ángel; Effect of charge-spin separation on the conductance through interacting low-dimensional rings; Elsevier Science; Physica B: Condensed Matter; 404; 19; 10-2009; 3147-3150
0921-4526
CONICET Digital
CONICET
Autor
Jimenez Rincon, Jose Julian
Hallberg, Karen Astrid
Aligia, Armando Ángel
Resumen
We calculate the conductance through Aharonov-Bohm chain and ladder rings pierced by a magnetic flux which couples with the charge degrees of freedom. The system is weakly coupled to two leads and contains strongly interacting electrons modeled by the prototypical t - J and Hubbard models. For a wide range of parameters we observe characteristic dips in the conductance as a function of magnetic flux which are a signature of spin and charge separation. We also show how the dips evolve when the parameters of the models depart from the ideal case of total spin-charge separation. The ladder ring can be mapped onto an effective model for large anisotropy which can be easily analyzed. These results open the possibility of observing this peculiar many-body phenomenon in anisotropic ladder systems and in real nanoscopic devices.