Abstract
The interplay between the Fano effect and electronic correlationsin a double-quantum-dot (DQD) structure is investigated by thefinite-U slave-boson mean-field method, and the focus is put on the influence of the Aharonov–Bohm(AB) effect on the transport properties. In the singly occupied regime, with weakantiferromagnetic correlation, the Fano–Kondo effect greatly suppresses the conductanceG, whereas the strong parity splitting blocks the path through the DQD, which is similar tothe time-reversal symmetric case. At the particle–hole symmetric point the peak usuallystill exists in the would-be peak-zero structure, but with the magnetic flux increased thezero is enhanced and eventually removed at quarter of a flux quantum. Results similar tothe frequency doubling of AB oscillation and the ‘pinning’ of the AB maximum can befound, which account for the appearance of a new transmission zero in the variation ofG with the energy levels on dots.
Published Version
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 call