Dynamical Symmetries in Kondo Tunneling through Complex Quantum Dots
Abstract
Kondo tunneling reveals hidden SO(n) dynamical symmetries of evenly occupied quantum dots. As is exemplified for an experimentally realizable triple quantum dot in parallel geometry, the possible values n=3,4,5,7 can be easily tuned by gate voltages. Following construction of the corresponding o_{n} algebras, scaling equations are derived and Kondo temperatures are calculated. The symmetry group for a magnetic field induced anisotropic Kondo tunneling is SU(2) or SO(4).
 Publication:

Physical Review Letters
 Pub Date:
 September 2002
 DOI:
 10.1103/PhysRevLett.89.156602
 arXiv:
 arXiv:condmat/0206050
 Bibcode:
 2002PhRvL..89o6602K
 Keywords:

 72.10.d;
 72.15.v;
 73.63.b;
 Theory of electronic transport;
 scattering mechanisms;
 Electronic conduction in metals and alloys;
 Electronic transport in nanoscale materials and structures;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 4 twocolumn pages with 4 encapsuled figures