Spin-charge separation in strongly interacting finite ladder rings

JULIÁN RINCÓN, K. HALLBERG, AND A. A. ALIGIA

PHYSICAL REVIEW B

AMER PHYSICAL SOC

Año: 2008 vol. 78 p. 1251151 - 1251154

1098-0121

  We study the conductance through Aharonov-Bohm finite ladder rings with strongly interacting electrons,modeled by the prototypical t-J model. For a wide range of parameters we observe characteristic dips in theconductance as a function of magnetic flux, predicted so far only in chains which are a signature of spin andcharge separation. These results open the possibility of observing this peculiar many-body phenomenon inanisotropic ladder systems and in real nanoscopic devices.