Abstract
We study the persistent current of a mesoscopic ring with an embedded quantum dot or a side-coupled quantum dot, using the finite-U slave boson mean-field approach suggested by Kotliar and Ruckenstein [Phys. Rev. Lett. 57, 1362 (1986)]. The persistent current shows interesting dependence on the energy of the dot level ∈ d as well as the total number of electrons N e (modulo 4) in the systems. In the mixed valence regime, the persistent current has a maximum value for the embedded quantum dot case, whereas it shows sharp transition between plateaus of diamagnetic and paramagnetic states for the side-coupled quantum dot case. The Kondo effects on the persistent current are also investigated.
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.
