Abstract
In this paper, we study persistent charge and spin currents in the ground state of theone-dimensional mesoscopic Hubbard ring with repulsive interaction based on itsBethe-ansatz solution. We find that the persistent charge current is suppressed bythe on-site Coulomb interaction more significantly at half-filling than away fromhalf-filling. As the system size increases the charge current decays exponentially asI∼L−1e−L/ξ in the half-filling case and decays in a power law away from the half-filling case. We alsofind that the persistent spin current is suppressed by the on-site Coulomb interaction, andit decays algebraically as the system size increases both at half-filling and away fromhalf-filling.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
