Magnetically Tunable Kondo-Aharonov-Bohm Effect in a Triangular Quantum Dot
Abstract
The role of discrete orbital symmetry in mesoscopic physics is manifested in a system consisting of three identical quantum dots forming an equilateral triangle. Under a perpendicular magnetic field, this system demonstrates a unique combination of Kondo and Aharonov-Bohm features due to an interplay between continuous [spin-rotation SU(2)] and discrete (permutation C3v) symmetries, as well as U(1) gauge invariance. The conductance as a function of magnetic flux displays sharp enhancement or complete suppression depending on contact setups.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2006
- DOI:
- 10.1103/PhysRevLett.96.046601
- arXiv:
- arXiv:cond-mat/0507488
- Bibcode:
- 2006PhRvL..96d6601K
- 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;
- Condensed Matter - Mesoscopic Systems and Quantum Hall Effect
- E-Print:
- 4 pages, 3 .eps figures