Features of spin-charge separation in the equilibrium conductance through finite rings

Abstract

We calculate the conductance through rings with few sites $L$ described by the $t-J$ model, threaded by a magnetic flux $\Phi$ and weakly coupled to conducting leads at two arbitrary sites. The model can describe a circular array of quantum dots with large charging energy $U$ in comparison with the nearest-neighbor hopping $t$. We determine analytically the particular values of $\Phi$ for which a depression of the transmittance is expected as a consequence of spin-charge separation. We show numerically that the equilibrium conductance at zero temperature is depressed at those particular values of $\Phi$ for most systems, in particular at half filling, which might be easier to realize experimentally.

8 pages, 7 figures

References in corpus (4)

• Spin-charge separation in cold Fermi-gases: a real time analysis
• Effects of interactions in transport through Aharonov-Bohm-Casher interferometers
• Charge and spin dynamics of interacting Fermions in a one dimensional harmonic trap
• Spin-charge separation and simultaneous spin and charge Kondo effect

Cited by in corpus (1)

• Conductance through strongly interacting rings in a magnetic field