Abstract
We consider the influence of the intra-dot Coulomb interaction U on the electron transport through the quantum dot coupled with non-magnetic leads. The transient spin-dependent current generated by a pulsed bias voltage applied across the quantum dot system is calculated using the equation of motion method for appropriate correlation functions. We find that the coherent quantum beats in both total current and spin current observed for vanishing U are strongly suppressed by non-zero interaction in the case of a single step-like voltage pulse applied to the system. It is found that for a pulsed bias voltage the Coulomb interaction can lead to much stronger spin polarized current occurring in some time windows. The possibility of the pure spin current together with the vanishing charge current is also discussed for the quantum dot coupled with threeleads.
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 callMore From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: 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.
