Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-06-28
Phys. Rev. Lett. 90, 026602 (2003)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures, ReVTeX
Scientific paper
10.1103/PhysRevLett.90.026602
We study a symmetrical double quantum dot (DD) system with strong capacitive inter-dot coupling using renormalization group methods. The dots are attached to separate leads, and there can be a weak tunneling between them. In the regime where there is a single electron on the DD the low-energy behavior is characterized by an SU(4)-symmetric Fermi liquid theory with entangled spin and charge Kondo correlations and a phase shift $\pi/4$. Application of an external magnetic field gives rise to a large magneto-conductance and a crossover to a purely charge Kondo state in the charge sector with SU(2) symmetry. In a four lead setup we find perfectly spin polarized transmission.
Borda Laszlo
Delft Jan von
Halperin Bertrand I.
Hofstetter Walter
Zarand Gergely
No associations
LandOfFree
SU(4) Fermi Liquid State and Spin Filtering in a Double Quantum Dot System 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 SU(4) Fermi Liquid State and Spin Filtering in a Double Quantum Dot System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SU(4) Fermi Liquid State and Spin Filtering in a Double Quantum Dot System will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-678294