Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-06-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
submitted for publication
Scientific paper
In circuits containing closed loops the operator for the current is determined by charge conservation up to an arbitrary divergenceless current. In this work we propose a formula to calculate the magnetically active circulating current $I_{\rm ring}$ flowing along a quantum ring connected to biased leads. By {\em gedanken experiments} we argue that $I_{\rm ring}$ can be obtained from the response of the gran-canonical energy of the ring to an external magnetic flux. The results agree with those of the conventional approach in the case of isolated rings. However, for connected rings $I_{\rm ring}$ cannot be obtained as a linear combination of bond currents.
Cini Michele
Perfetto Enrico
Stefanucci Gianluca
No associations
LandOfFree
Circulating currents and magnetic moments in quantum rings does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Circulating currents and magnetic moments in quantum rings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circulating currents and magnetic moments in quantum rings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-475231