Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-03-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 5 figures, references added
Scientific paper
We investigate electronic transport through parallel double quantum dot(DQD) system with strong on-site Coulomb interaction and capacitive interdot coupling. By applying numerical renormalization group(NRG) method, the ground state of the system and the transmission probability at zero temperature have been obtained. For a system of quantum dots with degenerate energy levels and small interdot tunnel coupling, the spin correlations between the DQDs is ferromagnetic, and the ground state of the system is a spin 1 triplet state. The linear conductance will reach the unitary limit ($2e^2/h$) due to the underscreened Kondo effect at low temperature. As the interdot tunnel coupling increases, there is a quantum phase transition from ferromagnetic to anti-ferromagnetic spin correlation in DQDs and the linear conductance is strongly suppressed.
Ding Guo-Hui
Dong Bing
Ye Fei
No associations
LandOfFree
Quantum phase transition and underscreened Kondo effect in electron transport through parallel double quantum dots 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 Quantum phase transition and underscreened Kondo effect in electron transport through parallel double quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum phase transition and underscreened Kondo effect in electron transport through parallel double quantum dots will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-223486