Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-12-05
Phys. Rev. B 83, 245121 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
25 pages, 9 figures
Scientific paper
10.1103/PhysRevB.83.245121
We argue through a combination of slave boson mean field theory and the Bethe ansatz that the ground state of closely spaced double quantum dots in parallel coupled to a single effective channel are Fermi liquids. We do so by studying the dots' conductance, impurity entropy, and spin correlation. In particularly we find that the zero temperature conductance is characterized by the Friedel sum rule, a hallmark of Fermi liquid physics, and that the impurity entropy vanishes in the limit of zero temperature, indicating the ground state is a singlet. This conclusion is in opposition to a number of numerical renormalization group studies. We suggest a possible reason for the discrepancy.
Konik Robert M.
Kulkarni Manas
No associations
LandOfFree
The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel 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 The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-166824