Prediction of Ferromagnetic Correlations in Coupled Double-Level Quantum Dots
Journal Article
·
· Physical Review Letters
- Oakland University, Rochester, MI
- ORNL
Numerical results for transport properties of two coupled double-level quantum dots (QDs) strongly suggest that under appropriate conditions the dots develop a novel ferromagnetic (FM) correlation at quarter filling (one electron per dot). In the strong coupling regime (Coulomb repulsion larger than electron hopping) and with interdot tunneling larger than tunneling to the leads, an S=1 Kondo resonance develops in the density of states, leading to a peak in the conductance. A qualitative 'phase diagram,' incorporating the new FM phase, is presented. In addition, the necessary conditions for the FM regime are less restrictive than naively believed, leading to its possible experimental observation in real QDs.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1003066
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 94; ISSN 1079-7114; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Interdot Coulomb correlation effects and spin-orbit coupling in two carbon nanotube quantum dots
Out-of-Equilibrium Kondo Effect in Double Quantum Dots
Tunable Coulomb blockade and giant Coulomb blockade magnetoresistance in a double quantum dot array
Journal Article
·
Mon Jan 27 23:00:00 EST 2014
· Journal of Applied Physics
·
OSTI ID:22275653
Out-of-Equilibrium Kondo Effect in Double Quantum Dots
Journal Article
·
Mon Aug 28 00:00:00 EDT 2000
· Physical Review Letters
·
OSTI ID:20217495
Tunable Coulomb blockade and giant Coulomb blockade magnetoresistance in a double quantum dot array
Journal Article
·
Fri Dec 31 23:00:00 EST 2010
· International Journal of Quantum Chemistry
·
OSTI ID:1024249