Abstract
We investigate the charge relaxation in a mesoscopic capacitor made of an interacting multilevel quantum dot with the spin exchange coupling. The charge relaxation resistance is numerically calculated and analyzed for ferromagnetic, antiferromagnetic, and two-stage Kondo regimes of the system under the singlet-triplet transition. We find that the relaxation resistance can be enhanced over the known universal value in each regime in its own distinctive way. The enhancement of the resistance occurs when the energy to break the spin binding that is formed by the Coulomb interaction and the spin exchange coupling is compensated by the external voltage source or the finite Zeeman splitting. The resultant spin fluctuations promote the generation of particle-hole pairs accompanying spin flip, which is responsible for the increase of the relaxation resistance.
Sign-in/Register to access full text options 
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.
